Relevant bibliographies by topics / Travertine

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Academic literature on the topic 'Travertine'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 August 2024

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Journal articles on the topic "Travertine"

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Blackwell, Bonnie, and H. P. Schwarcz. "U-Series Analyses of the Lower Travertine at Ehringsdorf, DDR." Quaternary Research 25, no. 2 (March 1986): 215–22. http://dx.doi.org/10.1016/0033-5894(86)90058-x.

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U-series analyses have been made of travertine samples from the archaeological site at Ehringsdorf-Weimar. The lower Travertine, in which hominid remains were found, yields apparent ages from >350,000 to 200,000 yr. Correlation between isotope ratios yields an age of about 230,000 yr. One sample of the upper Travertine gives and age of 111,000 ± 47,000 yr. Both upper and lower travertines contain fauna and flora indicative of interglacial conditions. The lower Travertine was deposited during isotope stage 7, while the upper Travertine may have been formed during isotope stage 5. This contradicts most earlier biostratigraphic studies which assigned both lower and upper Travertines to stages of the Eem interglaciation (correlative with isotope stage 5). The fauna and flora of the lower Travertine are significantly different from those of the upper Travertine, however, and in some respects are transitional to those of the travertines of Bilzingsleben, which appear to be older yet.
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Pentecost, Allan, and Heather Viles. "A Review and Reassessment of Travertine Classification." Géographie physique et Quaternaire 48, no. 3 (November 23, 2007): 305–14. http://dx.doi.org/10.7202/033011ar.

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ABSTRACTThis paper provides a review of the classification of travertines with emphasis on their morphology. Three criteria are used to describe them: geochemistry, microfabric and morphology. Geochemically, travertines may be divided into two groups, the meteogene travertines, where the carrier carbon dioxide originates in the soil and epigean atmosphere, and the thermal (thermogene) travertines where the carbon dioxide comes from thermally generated sources. Many travertine fabrics are influenced by bacteria and plants. These include 'stromatolitic' forms, many oncoids, shrubs, tufts, mats and moss travertines. Morphologically, travertines are conveniently divided into autochthonous (spring mounds and ridges, cascades, barrages, fluvial and lacustrine crusts, paludal deposits and cemented rudites) and the allochthonous or clastic travertines (valley-fills, back-barrage deposits, alluvial cones). Travertine deposits often include a wide range of fabrics and morphologies in one system. They are influenced locally by discharge, slope, vegetation, climate and human activity. Intergradations occur, both within travertine types but also with other freshwater deposits, e.g. calcrete and lake chalk. The influence of travertine deposition on the local hydrology and geomorphology is also discussed. The review emphasises the significance of scale and hydrology and aims to provide a unified scheme of travertine classification.
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Mas-Pla, Josep, Josep Trilla, and Maria Lluisa Valls. "Radiocarbon Dating of Travertines Precipitated from Freshwater." Radiocarbon 34, no. 3 (1992): 677–85. http://dx.doi.org/10.1017/s0033822200063967.

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We have studied the isotopic composition of recently precipitated travertines to determine the initial 14C activity of ancient travertine deposits. We found that the 14C activity of recent travertines of northeastern Spain was a function of the distance from the spring, resulting in variations in the initial 14C activity of the ancient travertine formations. We calculated the ancient travertine radiocarbon ages by using the ratio between the 14C activity of recent travertines and that of present atmospheric CO2 as the initial 14C activity.
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Roshanak, Reihaneh, Farid Moore, Alireza Zarasvandi, Behnam Keshavarzi, and Reinhard Gratzer. "Stable isotope geochemistry and petrography of the Qorveh–Takab travertines in northwest Iran." Austrian Journal of Earth Sciences 111, no. 1 (September 1, 2018): 64–74. http://dx.doi.org/10.17738/ajes.2018.0005.

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Abstract The Qorveh-Takab travertines, which are connected to thermal springs, are situated in the northwest of the Sanandaj- Sirjan metamorphic zone in Iran. In this study, the travertines were investigated applying petrography, mineralogy and isotope geochemistry. Oxygen and carbon isotope geochemistry, petrography, scanning electron microscopy (SEM) and X-ray powder diffraction (XRD) analysis were used to determine the source of the CO2 and the lithofacies and to classify the travertines. Isotope studies, morphological and mineralogical observations and distribution of travertines revealed that the travertines of the Qorveh-Takab could be of thermal water origin and, therefore, belong to the thermogene travertine category. These travertines are usually massive with mound-type morphology and are essentially found in regions with recent volcanic or high tectonic activity. The measured δ13C values of the travertines indicate that the δ13C of the CO2 released from the water during travertine deposition, while the source of the CO2 in the water springs seems to have been of crustal magmatic affinity. These travertines are divided into two lithofacies: (1) crystalline crust travertine and (2) pebbly (phytoclastic travertine with pebble- size extraclasts) travertine. δ18O and δ13C values of travertines are -0.6 to -11.9 (‰VPDB) and +6.08 to +9.84 (‰VPDB), respectively. A probable reason for the heavy carbon isotope content observed in these deposits is the presence of algae microorganisms, which was verified by SEM images. Fissure ridges, fluvial crusts with oncoids, and mound morphological features are observed in the study area. Based on the petrographic and SEM criteria, Qorveh-Takab travertines are classified into four groups: (1) compacted, (2) laminated, (3) iron-rich spring deposit and (4) aragonite-bearing travertines. Stable isotope compositions of Turkish travertines are largely similar to the travertines in the study area.
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Guerra-Merchán, Antonio, Francisco Serrano, José M. García-Aguilar, José E. Ortiz, Trinidad Torres, and Yolanda Sánchez-Palencia. "Development of Quaternary travertines in the carbonate mountains of the western Costa del Sol, Málaga, southern Spain." Quaternary Research 92, no. 1 (March 14, 2019): 183–200. http://dx.doi.org/10.1017/qua.2018.128.

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AbstractThe predominantly carbonate nature of the mountains near the coast of Málaga and Marbella (Costa del Sol, southern Spain) and the presence of springs have favored the formation of travertine buildups during the Quaternary. The geomorphic characteristics of the slopes and the location of the springs have determined the development of three types of travertine growths: (1) spring travertines, located preferentially on the south mountainside, where the slope is steepest; (2) pool-dam-cascade travertines, which form along the north and east edges, far from the carbonate relief and with a gentler slope; and (3) river-valley travertines, formed in the courses of the springs of any sector. Field observations combined with new amino acid racemization (AAR) dating of Helicidae gastropods show that most of the travertine formations are polyphasic and that their development was interrupted by stages of erosion and incision. Five stages of travertine development are evident, most of which are related to warm, moist episodes corresponding to marine oxygen isotope stages (MIS) 7, 5, 3, and 1, although local travertine growth also occurred during MIS 6 and during the transition from MIS 3 to 2.
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Pentecost, Allan. "Cyanobacteria associated with hot spring travertines." Canadian Journal of Earth Sciences 40, no. 11 (November 1, 2003): 1447–57. http://dx.doi.org/10.1139/e03-075.

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Cyanobacteria are the major oxygenic photosynthetic microorganisms of hot spring travertines. This review describes the known cyanobacterium flora of travertine-depositing waters > 37 °C. The communities develop either upon (epilithon) or within (endolithon) the travertine surface, where they may influence the travertine fabric by providing nucleation sites for calcium carbonate. Mat photosynthesis locally increases the amount of travertine deposited, but the importance of photosynthesis in travertine deposition is rarely significant because the main loss of CO2is by atmospheric evasion of the hot, CO2-rich waters. The Oscillatoriales are the most important group of cyanobacteria in terms of their biomass, but the taxonomy of the order is in a state of chaos. Molecular methods will ultimately disclose the true affinities of the organisms but, at present, the use of form-taxa based upon morphological characters provides a practical alternative. Identification of fossilized cyanobacteria is problematic since few of the key characters survive as fossils. The known cyanobacterium flora is tabulated and an analytical key provided to identify the form-taxa of hot spring travertines.
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Deev, Evgeny V., Svetlana N. Kokh, Yuri Dublyansky, Ella V. Sokol, Denis Scholz, Gennady G. Rusanov, and Vadim N. Reutsky. "Travertines of the South-Eastern Gorny Altai (Russia): Implications for Paleoseismology and Paleoenvironmental Conditions." Minerals 13, no. 2 (February 12, 2023): 259. http://dx.doi.org/10.3390/min13020259.

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The south-eastern Gorny Altai is one of the most hazardous seismogenic area in the north of Central Asia. We present a synthesis of field, 230Th-U geochronological, mineralogical and geochemical data collected on seven Quaternary travertines. All travertines occur within the zones of active faults that border the Chuya and Kurai intermontane basins. Travertine cement mainly comprises calcite (with minor amounts of aragonite), which cements alluvial, alluvial fan, and colluvial deposits. The results of 230Th-U dating suggest that deposition of the travertines was triggered by large paleoearthquakes in the last eight thousand years. Several stages of travertine formation with ages 9–11 ka BP correspond to the known period of strong paleoseismicity in the region (8–16 ka BP). The 123 ka BP travertine resulted from a slip triggered by the Middle Pleistocene deglaciation, while that of 400 ka BP represents seismic motions likely associated with the main Cenozoic orogenic phase. All travertine forming events fall within warm and wet climatic phases (interglacials). Large earthquakes activated faults and caused a rapid rise along them of ambient-temperature bicarbonate groundwater, which was previously sealed in deep-seated Upper Neoproterozoic–Paleozoic limestone-dolostone aquifers. Rapid CO2 degassing of the spring water was the most important control of calcite or aragonite precipitation. Such travertines represent an important tool for paleoseismological research in seismically active regions.
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Drysdale, Russell N. "Factors controlling the hydrochemistry of Louie Creek, a travertine-depositing stream in the seasonally wet tropics of northern Australia." Marine and Freshwater Research 52, no. 5 (2001): 793. http://dx.doi.org/10.1071/mf00117.

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Relationships among wet-season recharge, hydrochemistry and the distribution of travertines at Louie Creek were investigated from water samples collected during four campaigns between April 1993 and November 1997. pH, temperature and major cation and anion data reveal that the springs feeding the creek rise with high concentrations of CO2 and dissolved calcium carbonate. The pattern of downstream changes in hydrochemistry was similar during each campaign: rapid outgassing of CO2 over the ˜1.3 km of surface flow increases calcite saturation, triggering extensive travertine deposition over ˜1.5 km. At low discharge, the creek sinks then re-emerges at the downstream limit of travertine deposition in a more CO2-rich state. Together with a low stream gradient and high magnesium concentrations, this chemical change arrests the evolution of the waters and inhibits further accumulation of travertine downstream. Significant wet-season recharge dilutes spring water concentrations and retards their downstream evolution, resulting in a downstream shift of the reach of deposition. Following a wet season of low magnitude, the spring waters rise with higher concentrations of dissolved carbonate and evolve to a supersaturated state over a shorter distance. This results in an upstream migration of the travertine reach. These results have significance for the interpretation of fossil Quaternary travertines at Louie Creek.
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You, Yaxian, Huaguo Wen, Lianchao Luo, Zhipeng Lu, and Liang Li. "Stable Carbon and Oxygen Isotopic Features of Banded Travertines from the Xiagei Fissure Ridge System (Shangri-La, China)." Minerals 13, no. 1 (January 3, 2023): 76. http://dx.doi.org/10.3390/min13010076.

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Banded travertines are important parts of fissure ridge systems, but studies on geochemical characterization of banded travertines are limited. This study investigated the lithofacies and stable carbon and oxygen isotopic features of banded travertines from Xiagei (southwestern China) to examine their formation mechanisms. Petrographic analyses of the banded travertines revealed two lithotypes: thick-laminated palisade crystalline crust and thin-laminated composite crystalline crust. δ13C and δ18O of the Xiagei banded travertines range from 2.82‰ to 4.50‰ V-PDB, and from −25.86‰ to −20.90‰ V-PDB. Parent CO2 evaluation shows that the Xiagei banded travertines mainly received CO2 from the decarbonation of marine carbonates, but the contributions of magmatic CO2 and the dissolution of marine carbonates are also unneglectable. Significantly, the magmatic-derived CO2 might indicate that the delamination of the lithosphere along with the asthenosphere upwelling could be taking place in the eastern Tibetan plateau. Paleotemperature calculation shows that the Xiagei travertines were precipitated from moderate- to high-temperature hot springs (44.3 to 86.8 °C). Interestingly, the thick-laminated palisade crystalline crust and thin-laminated composite crystalline crust display calculated paleotemperature between 66.6 and 86.8 °C and between 56.6 and 77.7 °C, respectively, reflecting the great role of water temperature in controlling the lithofacies of banded travertines. A comparison between the banded travertines at Xiagei and other areas also shows temperature is a non-negligible factor controlling banded travertine precipitation. However, this does not mean that water temperature is the decisive controlling factor and more studies on banded travertines are still indispensable to disclose the potential factors controlling the factors/processes affecting banded travertine lithofacies. This study provides a good example for understanding the relationship between lithofacies and stable isotopic geochemical characteristics of travertine deposits.
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Pivko, Daniel. "Slovenská terminológia travertínov, penovcov a príbuzných terestrických vápencov." Geologické práce Správy 138 (February 24, 2023): 29–54. http://dx.doi.org/10.56623/gps.138.2.

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The paper follows on a review articles on Slovak travertines and tufa published in English in 2021. Geomorphological terms such as ‘fissure ridge’, ‘coalesced mound’, ‘self-buiding channel’, ‘keeled waterfall’, ‘smooth slope’, ‘terrased slope’, ‘dams along stream’, ‘peached springline deposits’, ‘moss pillow’ were defined as new in Slovak terminology. Travertine forms are formed by defined facies: ‘crystalline crusts’ with different crystal types, ‘radiating dendrites’, ‘coated bubbles’, ‘rafts’, and ‘breccias’ of various origin. Biogenic facies such as ‘microphyte mats’, ‘microphyte crusts’, ‘microphyte shrubs’, and ‘macrophyte facies’ appear in various tufas and travertines. In lakes, fens and marshes, the ‘lime-mudstones’ and the terms ‘mottling (marmorisation)’ and ‘pseudomikcokarst’ were defined. ‘Travertinized tufa’ was established as a transitional form between travertine and tufa.
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Dissertations / Theses on the topic "Travertine"

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Fleurent, Léonora. "Mécanismes d’enregistrement géochimique liés à des processus cinétiques au moment de la précipitation des travertins." Thesis, Université Paris-Saclay (ComUE), 2015. http://www.theses.fr/2015SACLS204/document.

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Si la relation entre l’enregistrement géochimique au sein de ces travertins et les paramètres environnementaux semble admise, le détail des processus, notamment cinétique et dégazage, ainsi que leur poids respectifs dans les reconstitutions paléoenvironnementales ne sont clairement établis. Afin de mieux contraindre ces processus, un travail minutieux de reconnaissance des mécanismes de précipitation et d’enregistrement de la signature géochimique a été effectué sur les travertins –récents et fossiles- d’une source carbogazeuse située dans le Massif Central (France). Il couple expériences de laboratoire innovantes et travail sérié sur le terrain.Le taux de dégazage du CO2 dans les sources carbogazeuses est l’un des facteurs principaux conduisant aux conditions de précipitation via la modulation du taux de précipitation de la calcite et par conséquent, sa composition en 18O et 13C. Les tests en laboratoire ont été conduits en deux étapes : (1) caractérisation des mécanismes de dégazage seuls, et (2) des expériences combinant dégazage et précipitation pour mieux appréhender les processus cinétiques lors de la précipitation des travertins. En parallèle, un travail de terrain spécifique par pose de plaques de plexiglas le long de différents écoulement de la source, nous a permis de connaitre la résolution de précipitation des travertins et d’obtenir une meilleure estimation des facteurs de fractionnement.Les tests en laboratoire confirment que, lors d’un dégazage important, i.e. conduisant à la précipitation de travertins, la spéciation des espèces du carbone inorganique dissout (CID) et les flux entre ces espèces sont des paramètres primordiaux à considérer. Le facteur de fractionnementεDIC-CO2(g) qui dépend du pH suit alors une distillation de Rayleigh dans un système cinétique. Les évolutions des espèces carbonées en solution ont ainsi pu être modélisées à l’aide d’une équation de diffusion faisant intervenir les paramètres propres à l’expérience.Les résultats de terrain permettent de démontrer que les variations de conditions de précipitation sont principalement dues aux variations de conditions hydrodynamiques et, secondairement, aux variations de température, ce qui a pu être modélisé à l’aide de l’équation définie par Plummer en 1968 et qui a montré la variabilité des conditions de précipitation in-situ. Dans le cas des expériences de précipitation en laboratoire et par comparaison avec les données de terrain, le facteur de fractionnement εCID-calcite va dépendre des concentrations de chaque espèce de CID mais aussi de la partition du carbone entre phase gaz et phase solide. Pour l’oxygène 18, de 0°C à 10°C, les résultats acquis sur les travertins actuels nous ont permis d’utiliser la droite définie récemment par Coplen (2007) pour lier de façon fiable la température au moment de la précipitation et le facteur de fractionnement. Toutefois, pour des températures plus élevées, le facteur de fractionnement est plus important que ce qu’il devrait et confirmant ainsi la non-représentativité des droites de Coplen pour la détermination de la température de précipitation. Lors des expériences de précipitation la tendance est inverse à celle observée pour les travertins confirmant l’influence de la vitesse de dégazage et de l’indice de saturation sur le fractionnement isotopique. Nous avons également confirmé avec les expérimentations, l’impact de la vitesse de précipitation sur les teneurs isotopiques enregistrées dans les travertins.Ce travail a mis en lumière des mécanismes cinétiques complexes et qui ne sont pas complètement contraints par la seule utilisation des outils isotopiques. L’utilisation du partitionnement des éléments traces est un outil primordial pour appuyer l’étude de ces mécanismes
The response of continental groundwater systems to recent climate fluctuations can be reconstructed via the continuous measurement of groundwater level, spring flow and climatic chronicles. When any data exist, recent reconstructions of groundwater dynamics may be reached through various recorders of environmental and hydrological conditions such as travertine. Although the relationship between geochemical records in travertine and environmental parameters seems to be accepted, the details of processes and their respective weight in the paleo-information are not clearly established.Rate of CO2 degassing in CO2-rich spring likely influences calcite precipitation rate and the related δ18O and δ13C composition. Isotopic equilibrium is rarely maintained during travertine deposition and the degassing rate is the main controlling factor of the disequilibrium. Due to the lack of knowledge, fractionation processes, either kinetic or equilibrium, occurring between CO2-rich water, gas and travertine required specific pH and temperature-controlled laboratory tests. These tests were conducted on synthetic water at different pH to focus only on the degassing processes. Other tests were conducted on trace elements partitioning during calcite precipitation, to identify the origin of isotopic signature variability, and to constraint the way of recording past conditions.All these tests confirmed that during a degassing leading to travertine precipitation, the speciation of dissolved inorganic carbon species is a major parameter to be tackled since a linear relationship between εDIC-CO2(g) and pH is observed. Indeed, we highlighted that for a high degassing rate, the isotopic equilibrium is not reached because the reaction greater involves light isotopes than heavy ones. There is thus different reaction rate between the species of dissolved inorganic carbon, the reactions occurring faster in the water than the one between water and gas, the latter being controlled by diffusion
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Overby, Steven T., and Daniel G. Neary. "Travertine Geomorphology of Fossil Creek." Arizona-Nevada Academy of Science, 1996. http://hdl.handle.net/10150/296999.

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HUILLCA, CARLOS ALBERTO LUZA. "EXPERIMENTAL STUDY OF THE GEOMECHANICAL BEHAVIOR OF TRAVERTINE." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2014. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=24637@1.

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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO
COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR
PROGRAMA DE EXCELENCIA ACADEMICA
O Travertino é uma rocha amplamente usada no mundo como rocha ornamental, mas suas propriedades petrológicas e mecânicas análogas a rochas carbonáticas de reservatório influenciaram em sua escolha para a compreensão do comportamento geomecânico destas formações. Neste sentido, este trabalho procurou analisar o comportamento geomecânico do Travertino Romano mediante um programa experimental que incluiu uma caracterização da petrologia, da estrutura porosa e do comportamento mecânico da rocha. Foi determinada sua estrutura e textura sedimentar, composição química, mineralógica e índices físicos. Além disso, sua complexa estrutura porosa foi caracterizada por análise de imagens 2D e 3D geradas no microscópio óptico e no micro-tomógrafo de raios-X, com a determinação da presença de macro e micro poros, distribuídos aleatoriamente na rocha com uma baixa conectividade, assim mesmo foi também estabelecida uma relação entre a porosidade e a resistência. Analisaram-se também os resultados dos ensaios de resistência mecânica, que tanto para o estado de tensão uniaxial como triaxial mostraram um decréscimo da resistência com o incremento da porosidade, apresentando um comportamento frágil na maioria dos casos.
The Travertine is a rock widely used in the world as an ornamental rock, but their analogous petrological and mechanical properties to carbonate rocks of reservoir influenced his choice to be able to understand the geomechanical behavior of these formations. Thus, this study sought to analyze the geomechanical behavior of Roman Travertine through an experimental program that included a characterization of petrology, the porous structure and mechanical behavior of the rock. Sedimentary structure and texture, chemical, mineralogical composition and physical indexes was determined. Moreover, Its complex porous structure was characterized by analysis of 2D and 3D images generated in the optical microscope and X-Ray micro CT-scanner, with the determination of the presence of macro and micro pores, randomly distributed in the rock with a low connectivity, so it was also established a relationship between the porosity and strength. Also analyzed the test results of mechanical strength, both to the state of uniaxial to triaxial stress showed a decrease in resistance with increasing porosity, with a brittle behavior in most cases.
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Kamradt, Ivonne. "Die thüringischen Travertine Verbreitung und Genese am Beispiel ausgewählter Vorkommen." Aachen Shaker, 2009. http://d-nb.info/999440195/04.

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Pechová, Riedlová Mária. "RADNICE - VĚC VEŘEJNÁ, Správní centrum městské části Brno-sever." Master's thesis, Vysoké učení technické v Brně. Fakulta architektury, 2015. http://www.nusl.cz/ntk/nusl-216159.

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The aim of the work was to design a town hall for Brno city, burrough Sever. Currently, the location is separated from public life by a high wall. What is more, it does not match the style of surrounding buildings. The proposed town hall design strives to revive the location. It uses one of the three existing buildings built in 1920. The building is proposed to be rennovated and extended by a new modern architectonic object. This way, the whole complex would naturally fit into the original structure. The location of the town hall merges the historic with the modern introducing new values into the place.
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Kamradt, Ivonne [Verfasser]. "Die thüringischen Travertine : Verbreitung und Genese am Beispiel ausgewählter Vorkommen / Ivonne Kamradt." Aachen : Shaker, 2009. http://d-nb.info/1161300430/34.

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Goffredo, Giovanni Battista. "Smart surfaces for architectural heritage: self-cleaning titanium dioxide nano-coatings on travertine." Doctoral thesis, Università Politecnica delle Marche, 2013. http://hdl.handle.net/11566/242745.

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Lo sviluppo e l'applicazione di trattamenti auto-pulenti su pietre di valore storico e architettonico possono portare a miglioramenti significativi nella conservazione, la protezione e il mantenimento dei Beni Architettonici. Il biossido di titanio (TiO2) può essere utilizzato per realizzare rivestimenti auto-pulenti trasparenti sulle pietre, limitando interventi di pulizia e manutenzione, l'insorgere di processi di degradazione e riducendo i costi di mantenimento. La capacità auto-pulente del biossido di titanio è dovuta alle sue due proprietà foto-indotte attivate dall'irraggiamento ultravioletto della luce solare: fotocatalisi e superidrofilia. Lo scopo di questa ricerca è quello di analizzare questo effetto. Due diversi prodotti a base di titania, ottenuti tramite due processi differenti, sono stati depositati sul travertino (una pietra calcarea porosa usata spesso in edifici storici e monumentali) tramite spray, ottenendo un trattamento a strato unico e uno a tre strati per ogni prodotto. Gli effetti del quantitativo depositato di titania sulle caratteristiche delle superfici trattate sono stati considerati nelle analisi seguenti. Per verificare l'uso del TiO2 nel campo dei Beni Culturali, la conservazione dell'aspetto delle superfici di travertino è stata monitorata analizzando colore e brillantezza. I possibili effetti dannosi dell'idrofilia foto-indotta e l'eventuale maggiore assorbimento d'acqua da parte della pietra trattata sono stati valutati mediante analisi dell'assorbimento d'acqua per capillarità, dell'angolo di contatto e dell'assorbimento superficiale prima e dopo la deposizione del TiO2. Test anti-inquinamento e di rimozione dello sporco sono stati effettuati sotto luce UV per stimare l'efficacia auto-pulente. I risultati sembrano consentire l'uso di trattamenti a base TiO2 su superfici storiche e architettoniche costituite da travertino. Ulteriori analisi sono necessarie per valutare le caratteristiche dei nano-rivestimenti di TiO2.
The development and application of self-cleaning treatments on historical and architectural stone surfaces could lead to significant improvements in conservation, protection and maintenance of Architectural Heritage. Titanium dioxide (TiO2) can be used to realize transparent self-cleaning coatings on stone surfaces as an active and preventive protection system, limiting cleaning and maintenance actions, decreasing the onset of degradation processes and reducing maintenance costs. The self-cleaning ability of titanium dioxide is due to its two photo-induced properties activated by ultraviolet irradiation of solar light: photocatalysis and superhydrophilicity. The aim of this research is to analyse this effect. Two different titania-based products, obtained by two different processes, were deposited on travertine (a porous limestone often used in historical and monumental buildings) by spray coating in two different ways, obtaining a single-layer and a three-layers treatment for each product. The effects of deposited amount of titania on the characteristics of treated surfaces were evaluated in following analyses. In order to verify the potential use of titania in the field of Cultural Heritage, the maintenance of appearance properties of the treated travertine surfaces was monitored by colour and gloss analyses. The potential harmful effects of photo-induced hydrophilicity and eventual greater water absorption by treated stone was evaluated through water absorption by capillarity, static contact angle and surface water absorption analyses before and after the TiO2 deposition. De-pollution and soiling removal tests were carried out under UV-light exposure to evaluate photo-induced effects and self-cleaning efficiency. Results seem to allow the use of TiO2-based treatments on historical and architectural surfaces made up by travertine. Further analyses are necessary to evaluate the multidisciplinary features of TiO2 nano-coatings.
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Frery, Emanuelle. "Circulation épisodique de fluides réactifs le long de failles de l'échelle de travertins à celle de bassins, sur l'exemple du plateau du Colorado (USA)." Phd thesis, Université de Grenoble, 2012. http://tel.archives-ouvertes.fr/tel-00864036.

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Cette thèse s'attache à caractériser l'évolution dans le temps et l'espace des circulations de fluides le long des failles. Une approche multidisciplinaire et multi-échelle a été mise en place sur un exemple naturel dans la région du plateau du Colorado (Utah): du terrain à la modélisation et de la proche-surface au bassin. L'étude des minéralisations en proche surface et leur lien avec le transfert le long des failles a été effectuée sur des travertins récents. L'analyse isotopique et la datation U/Th des veines de travertins révèle des cycles de circulation de fluides enrichis en CO2 et de précipitation épisodiques de carbonates de calcium (travertin) correspondant à des cycles saisonniers ou climatiques (annuels et centennals) ainsi qu'à des cycles qui s'apparentent à des cycles sismiques de l'ordre du millier d'années. Ces données permettent de calibrer le volume de CO2 qui a fuit par la faille. Des zones de paléo-circulation, témoins de l'activité des failles sur le long-terme, sont observées sous forme de blanchiment chimique ("bleaching") des grès à l'affleurement, et ont été étudiées à l'échelle du bassin. Deux épisodes principaux de circulation de fluides le long des failles ont été distingués : une première circulation durant l'enfouissement maximum puis une seconde circulation le long des réservoirs et des failles, qui est reliée à des phénomènes tectoniques régionaux, compemporains de la remontée du Plateau du Colorado. La dernière circulation s'est découpée en plusieurs pulses avec des circulations de fluides de différente nature (tels que des saumures, des fluides riches en hydrocarbures ou en CO2) au cours du temps et le long des failles.
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Croci, A. "CARBONATE DEPOSITION IN CONTINENTAL SETTINGS: SPATIAL DISTRIBUTION AND PETROGRAPHY OF LATE MESSINIAN TRAVERTINES IN ALBEGNA BASIN (SOUTHERN TUSCANY) AND LATE PLEISTOCENE TRAVERTINES IN AQUE ALBULE BASIN (TIVOLI, CENTRAL ITALY)." Doctoral thesis, Università degli Studi di Milano, 2016. http://hdl.handle.net/2434/362798.

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The hydrocarbon reservoir discoveries in continental Lower Cretaceous carbonates in the South Atlantic Pre-Salt (offshore Brazil and Angola) have renewed the scientific interest in recent and ancient carbonates developed in lacustrine, hydrothermal and fluvial environments. Outcrop analogues provide key information to improve the understanding of the stratigraphic, sedimentological, diagenetic and petrophysical subsurface reservoir properties and lithofacies spatial distribution. To improve the knowledge about continental carbonates lithofacies types, stratigraphic architecture and diagenesis, this project focuses on two case studies: the Messinian mixed terrigenous-travertine succession of the Albegna Basin (Southern Tuscany, Central Italy) and the Pleistocene Acque Albule Lapis Tiburtinus (Tivoli, Central Italy). In the both studied areas, travertines include facies types precipitated from thermal water through abiotic and biologically influenced processes, ranging from clotted peloidal micrite boundstone, to crystalline dendrites and coated reeds. The 70 m thick Messinian mixed terrigenous-travertine system, accumulated in the extensional continental Neogene Albegna Basin, was investigated in terms of lithofacies types, depositional environment and their spatial distribution, petrographic analysis, carbon and oxygen stable isotope geochemistry, diagenesis and porosity. The succession recorded three phases of evolution of the depositional system. 1) At the base, a 20 m thick northward prograding hydrothermal travertine terraced slope interfingered in the eastern part with an alluvial plain system prograding northward and westward (Phase I). 2) The continuous travertine succession was interrupted by the deposition of several metres thick alluvial fan breccias intercalated with 2-3 m thick travertine lenses (Phase II). 3) During Phase III, the basin evolved into an alluvial plain with ponds rich in coated reed travertines. Travertine stable isotope signatures during phase I and II confirm the geothermal origin of the precipitating water with 13C value averaging 1.46 ‰ V-PDB, while 18O is -7.50 ‰. Phase III travertines, enriched in coated plants, show lighter 13C values (mean 13C -0.36 ‰; 18O -7.22 ‰) indicative of influence of meteoric water with soil-derived CO2. The paragenetic history of the studied succession shows that it was affected by hydrothermal, meteoric and burial diagenesis. The studied succession was firstly affected by a burial phase, afterwards followed by uplift and exhumation to meteoric diagenesis. The 20 km2 and 50 m thick Pleistocene travertine succession accumulated in the Acque Albule Basin close to Tivoli village was investigated in terms of lithofacies types, its geometry and architecture, through the analyses and the correlation of six drilled borehole cores. The travertine unit consists of a wedge shape geometry thinning southwards and it is subdivided in a proximal, intermediate and distal part from North to South. The succession recorded four principal units separated by four main unconformities that consist of centimetre to few metres thick intraclastic/extraclastic wackestone to floatstone/rudstone, indicative of periods of non deposition and erosion, due to the temporary interruption of the thermal water out of the springs. The southern part of the wedge is intercalated with conglomerate and sandstone representing palaeo-river channels. This study shows the stratigraphic architecture and sedimentary evolution of these two decametre scale continental sedimentary successions in which hydrothermal activity and travertine precipitation were driven by the extensional and transtensive tectonic regimes, with faults acting as fluid paths for thermal water and creation of accommodation space for terrigenous and travertine deposition. Humid climate might have been instrumental for the aquifer recharge that fed the hydrothermal vents. This study proposes two different geological models useful for further comparison with other continental basin successions and hydrothermal travertine systems in outcrops and subsurface. It provides useful information for the petrographic, spatial and reservoir characterization of subsurface travertine analogues.
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Mitchell, Colin Raymond. "Numerical Simulation of Calcium Carbonate Formation." University of Akron / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=akron1294360826.

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Books on the topic "Travertine"

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Polat, Selahattin. Bolluk traverten konileri. Fatih, İstanbul: Kriter, 2018.

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Kano, Akihiro, Tomoyo Okumura, Chizuru Takashima, and Fumito Shiraishi. Geomicrobiological Properties and Processes of Travertine. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-1337-0.

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Borgia, Roberto. Lapis Tiburtinus: La lunga storia del travertino : maggio 2019-31 gennaio 2020 : catalogo = the long story of travertine. Tivoli: Comune di Tivoli, 2019.

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Rosanna, Cappelli, and Blanco Giorgio, eds. Il travertino: Marmo del Lazio. Roma: Ministero per i beni culturali e ambientali, 1992.

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America, Marble Institute of, ed. Natural stone: Marble, onyx, travertine, granite, quarzite, limestone. 6th ed. Firenze: Studio Marmo, 2005.

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Wenzel, Stefan. Die Funde aus dem Travertin von Stuttgart-Untertürkheim und die Archäologie der letzten Warmzeit in Mitteleuropa. Bonn: R. Habelt, 1998.

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Szabo, B. J. Paleoclimatic, paleohydrologic and tectonic applications of uranium-series dating of travertine and calcite vein samples from southern Great Basin and Grand Canyon areas. [Denver, CO]: U.S. Geological Survey, 1995.

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Derevi︠a︡nko, A. P. Rannepaleoliticheskie mikroindustrialʹnye kompleksy v travertinakh i︠u︡zhnogo Kazakhstana. Novosibirsk: [Izd-vo In-ta arkheologii i ėtnografii SO RAN], 2000.

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Lands, Montana Department of State. Environmental assessment for a proposed quarry expansion by Livingston Marble and Granite Corp. Helena, Mont: Dept. of State Lands, 1992.

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Lands, Montana Department of State. [Environmental assessment evaluating actions at the Livingston Marble and Granite Works involving accessing the Gold Quarry waste rock dump by a new road]. Helena, Mont: Dept. of State Lands, 1994.

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Book chapters on the topic "Travertine"

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Kano, Akihiro, Tomoyo Okumura, Chizuru Takashima, and Fumito Shiraishi. "Sedimentology of Travertine." In Geomicrobiological Properties and Processes of Travertine, 43–66. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-1337-0_3.

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Kano, Akihiro, Tomoyo Okumura, Chizuru Takashima, and Fumito Shiraishi. "Travertines in Japan." In Geomicrobiological Properties and Processes of Travertine, 133–73. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-1337-0_7.

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Kano, Akihiro, Tomoyo Okumura, Chizuru Takashima, and Fumito Shiraishi. "Introduction." In Geomicrobiological Properties and Processes of Travertine, 1–7. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-1337-0_1.

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Kano, Akihiro, Tomoyo Okumura, Chizuru Takashima, and Fumito Shiraishi. "Basic Knowledge of Geochemical Processes." In Geomicrobiological Properties and Processes of Travertine, 9–41. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-1337-0_2.

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Kano, Akihiro, Tomoyo Okumura, Chizuru Takashima, and Fumito Shiraishi. "Methods." In Geomicrobiological Properties and Processes of Travertine, 67–88. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-1337-0_4.

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Kano, Akihiro, Tomoyo Okumura, Chizuru Takashima, and Fumito Shiraishi. "Geomicrobiological Processes for Laminated Textures." In Geomicrobiological Properties and Processes of Travertine, 89–111. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-1337-0_5.

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Kano, Akihiro, Tomoyo Okumura, Chizuru Takashima, and Fumito Shiraishi. "Geochemical Model for Rapid Carbonate Precipitation of Travertines." In Geomicrobiological Properties and Processes of Travertine, 113–31. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-1337-0_6.

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Kano, Akihiro, Tomoyo Okumura, Chizuru Takashima, and Fumito Shiraishi. "Concluding Remarks." In Geomicrobiological Properties and Processes of Travertine, 175–76. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-1337-0_8.

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Bogiatzis, Petros, George Vargemezis, Gregory Tsokas, Ilias Fikos, Eftychia Amanatidou, Nikolaos Kordatos, Prodromos Louvaris, Konstantinos Polydoropoulos, and Alexandra Karamitrou. "Internal structure of the great tumulus of Apollonia as revealed by seismic tomography." In Advances in On- and Offshore Archaeological Prospection, 141–50. Kiel: Universitätsverlag Kiel | Kiel University Publishing, 2023. http://dx.doi.org/10.38072/978-3-928794-83-1/p15.

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We investigate the tumulus of Apollonia using the NSTomo3D seismic tomography software. Results reveal P-wave velocities of >850 m/s at the perimeter and <650 m/s in the middle. High velocities are associated with travertine rocks that were used as building materials. Low velocities correspond to unconsolidated sediments used as filling material. Several structures revealed that are of potential archaeological interest.
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Benkhard, Borbála. "Travertine Mound of Egerszalók: The Hungarian Pamukkale." In World Geomorphological Landscapes, 201–7. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-08997-3_23.

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Conference papers on the topic "Travertine"

1

Zeigler, K. E., L. J. Crossey, L. Schuyler, D. Phillips, and K. E. Karlstrom. "Prehistoric travertine pendants from central New Mexico: Potential relationships with known travertines." In 2011 New Mexico Geological Society Annual Spring Meeting. Socorro, NM: New Mexico Geological Society, 2011. http://dx.doi.org/10.56577/sm-2011.604.

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Djurić, Bojan, Sándor Kele, and Igor Rižnar. "The Budakalász Travertine Production." In XI International Conference of ASMOSIA. University of Split, Arts Academy in Split; University of Split, Faculty of Civil Engineering, Architecture and Geodesy, 2018. http://dx.doi.org/10.31534/xi.asmosia.2015/03.04.

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DE SOLE, P., R. FRESU, C. ROSSI, M. L. GOZZO, E. GAMMAROTA, S. SPADARO, M. SERRA, and F. MORMILE. "WHOLE BLOOD CHEMILUMINESENCE IN TRAVERTINE WORKERS." In Bioluminescence and Chemiluminescence - Progress and Current Applications - 12th International Symposium on Bioluminescence (BL) and Chemiluminescence (CL). WORLD SCIENTIFIC, 2002. http://dx.doi.org/10.1142/9789812776624_0054.

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Semenova, N. M., A. M. Sokolov, N. M. Moiseev, T. M. Ganiev, and Т. S. Otcheskaya. "THE SOME RESULTS OF THE RESEARCH OF THE NATURE MONUMENT «SUKHORECHENSKIYE CUPS» IN THE VICINITY OF TOMSK CITY." In Prirodopol'zovanie i ohrana prirody: Ohrana pamjatnikov prirody, biologicheskogo i landshaftnogo raznoobrazija Tomskogo Priob'ja i drugih regionov Rossii. Izdatel'stvo Tomskogo gosudarstvennogo universiteta, 2020. http://dx.doi.org/10.17223/978-5-94621-954-9-2020-20.

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Some results of the study of lime caps in the Ushayka river basin near the village of Sukhorechye are presented. The morphometric features of travertine springs are considered. The need for special protection of the Sukhorechenskiye caps is determined.
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Metlek, Sedat, Bayram Cetisli, and Ahmet Fatih Senel. "Classification of travertine plates with image processing." In 2015 23th Signal Processing and Communications Applications Conference (SIU). IEEE, 2015. http://dx.doi.org/10.1109/siu.2015.7130129.

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Erthal, M., F. S. De Carvalho, L. C. Falcão, O. M. Gonçalvez Jr, and A. P. Da Silva. "Subaerial Travertine Facies – A Pre-Salt Oasis." In Third EAGE Conference on Pre Salt Reservoirs. European Association of Geoscientists & Engineers, 2022. http://dx.doi.org/10.3997/2214-4609.202288026.

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Ricketts, Jason W., Lin Ma, Amy E. Wagler, and Victor H. Garcia. "GLOBAL TRAVERTINE DEPOSITION MODULATED BY OSCILLATIONS IN CLIMATE." In GSA Annual Meeting in Phoenix, Arizona, USA - 2019. Geological Society of America, 2019. http://dx.doi.org/10.1130/abs/2019am-336795.

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Drayton, D., and Q. Fisher. "The Impact of Faults on Fluid Flow in Travertine." In Fifth International Conference on Fault and Top Seals. European Association of Geoscientists & Engineers, 2019. http://dx.doi.org/10.3997/2214-4609.201902352.

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Priewisch, Alexandra, Laura J. Crossey, Karl E. Karlstrom, Hank S. Chafetz, and M. A. Cook. "Geochronology and geochemical analysis of Quaternary travertine deposits at the Belen quarries of Mesa Aparejo, NM: Evaluation of travertine facies for paleohydrology and paleoenvironment Studies." In 67th Annual Fall Field Conference. New Mexico Geological Society, 2016. http://dx.doi.org/10.56577/ffc-.405.

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Priewisch, Alexandra, Laura J. Crossey, Karl E. Karlstrom, Hank S. Chafetz, and M. A. Cook. "Geochronology and geochemical analysis of Quaternary travertine deposits at the Belen quarries of Mesa Aparejo, NM: Evaluation of travertine facies for paleohydrology and paleoenvironment Studies." In 67th Annual Fall Field Conference. New Mexico Geological Society, 2016. http://dx.doi.org/10.56577/ffc-67.405.

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