Relevant bibliographies by topics / Tufa

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Academic literature on the topic 'Tufa'

Author: Grafiati
Published: 4 June 2021
Last updated: 26 January 2023

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Journal articles on the topic "Tufa"

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DeMott, Laura M., and Christopher A. Scholz. "Lacustrine carbonate tufa facies of Winnemucca Dry Lake Basin, Nevada, U.S.A." Journal of Sedimentary Research 90, no. 12 (December 31, 2020): 1804–28. http://dx.doi.org/10.2110/jsr.2020.004.

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ABSTRACT Lacustrine carbonate tufa deposits are common in present-day lakes and dry pans of the western United States, and large-scale deposits (> 100 m high) are found throughout the subbasins of Pleistocene Lake Lahontan. This study presents a depositional model for very well exposed tufa in Winnemucca Dry Lake, a subbasin of Lake Lahontan, that incorporates new observations of tufa growth over length scales of 10–4–102 m. Tufa depositional facies are defined on the basis of outcrop morphology and texture. Deposits were mapped using satellite imagery and field observations. Tufa facies and volumes were quantified for seven tufa exposures across the basin using digital outcrop and elevation models from aerial images acquired from a small uncrewed aerial system (sUAS). Tufa thin sections were examined using transmitted-light petrography and scanning electron microscopy and combined with measurements of porosity and permeability to define small-scale facies characteristics. Both porosity and permeability are highly variable across textures; average values for both (ϕ = 29%, k = 5.5 D) indicate that all tufa types may exhibit excellent reservoir properties. The age and distribution of these facies across the basin are directly linked to hydroclimate and variations in lake level. The most important controls on tufa distribution at the basin scale are basin hydrology and pathways of groundwater inflow. Groundwater flow into the basin is largely concentrated along the western flexural margin along the contact between volcanic and volcaniclastic bedrock and alluvial sediments, rather than concentrated along the border fault margin, in contrast to other models which predict strong fault control of tufa occurrence. Microbially influenced tufa textures and morphologies are the most volumetrically significant tufas in the basin, composing between 77% and 100% of tufa volume at individual exposures; these are inferred to form during times when lake waters were warmer and levels higher, while physico-chemical processes dominate during early tufa formation, and generally in colder waters and under conditions of lower lake level. Deposition of tufas is a result of combined physical, chemical, and biological factors that are directly related to the basin geology and hydroclimate; however, the importance of each controlling factor is highly variable both spatially and temporally, complicating the development of effective and predictive depositional models. This case study describes tufa deposition intrinsically linked to basinal hydroclimatic histories, and understanding these relationships may assist in predicting volumes, physical properties, and stacking patterns of petroleum reservoir facies in lacustrine basins.
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Isabel, Sandra, Éric Leblanc, Maurice Boissinot, Dominique K. Boudreau, Myrian Grondin, François J. Picard, Eric A. Martel, et al. "Divergence among Genes Encoding the Elongation Factor Tu of Yersinia Species." Journal of Bacteriology 190, no. 22 (September 12, 2008): 7548–58. http://dx.doi.org/10.1128/jb.01067-08.

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ABSTRACT Elongation factor Tu (EF-Tu), encoded by tuf genes, carries aminoacyl-tRNA to the ribosome during protein synthesis. Duplicated tuf genes (tufA and tufB), which are commonly found in enterobacterial species, usually coevolve via gene conversion and are very similar to one another. However, sequence analysis of tuf genes in our laboratory has revealed highly divergent copies in 72 strains spanning the genus Yersinia (representing 12 Yersinia species). The levels of intragenomic divergence between tufA and tufB sequences ranged from 8.3 to 16.2% for the genus Yersinia, which is significantly greater than the 0.0 to 3.6% divergence observed for other enterobacterial genera. We further explored tuf gene evolution in Yersinia and other Enterobacteriaceae by performing directed sequencing and phylogenetic analyses. Phylogenetic trees constructed using concatenated tufA and tufB sequences revealed a monophyletic genus Yersinia in the family Enterobacteriaceae. Moreover, Yersinia strains form clades within the genus that mostly correlate with their phenotypic and genetic classifications. These genetic analyses revealed an unusual divergence between Yersinia tufA and tufB sequences, a feature unique among sequenced Enterobacteriaceae and indicative of a genus-wide loss of gene conversion. Furthermore, they provided valuable phylogenetic information for possible reclassification and identification of Yersinia species.
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Drysdale, Russell, and John Head. "Geomorphology, Stratigraphy and 14C-Chronology of Ancient Tufas at Louie Creek, Northwest Queensland, Australia." Géographie physique et Quaternaire 48, no. 3 (November 23, 2007): 285–95. http://dx.doi.org/10.7202/033009ar.

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ABSTRACT Louie Creek is a karst spring-fed stream situated in the seasonally humid tropics of northwest Queensland, Australia. It rises as a series of small exsurgences along the eastern edge of the Barkly Tableland. As it enters the lowlands of the Carpentaria plain, the creek deposits tufa which produces a series of cascades. This modern tufa extends discontinuously for about 1.5 km. A series of ancient tufas, in places lying adjacent to sites of modern deposition, extends discontinously for about 8 km downstream. At least two ancient tufa units are preserved at one location, Little lndarri site. The older unit comprises a sequence of well-preserved barrages with an orientation transverse to present-day stream flow. In places, erosion has reduced these barrages to their calcrete substrate. The older tufa is overlain in places by sediment which has become cemented to form a second calcrete unit. This sediment is in turn succeeded by the younger ancient tufa. Subsequent river incision has removed part of the sediment from the older unit and exposed several contact points between the ancient tufa and calcrete units. Radiocarbon dating of the Little lndarri site tufas, as well as other ancient Louie Creek units, yielded apparent ages ranging from ~ 30 to ~ 14 ka BP, suggesting that conditions were sufficiently wet during the period immediately preceding and throughout the Last Glacial Maximum for tufa depostion to occur. However, ancient tufa formation occurred during a phase of net river aggradation. There is geomorphic evidence that such aggradation was a result of an increased sediment supply to the fluvial system, most likely in response to conditions drier than present. Results from studies elsewhere in the region support such a Late Pleistocene trend. Incision of Louie Creek, which postdates the youngest of the dated ancient tufas, is most likely to have resulted from a shift to wetter conditions during the early Holocene,
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Pazdur, Anna. "The Relations Between Carbon Isotope Composition and Apparent Age of Freshwater Tufaceous Sediments." Radiocarbon 30, no. 1 (1988): 7–18. http://dx.doi.org/10.1017/s0033822200043915.

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This paper presents a synthetic approach to 14C dating of calcareous tufa, based on statistical analysis of correlations betwen lithologic type of tufaceous sediment, carbon isotope composition, and apparent age. Experimental data on several profiles from southern Poland and the United Kingdom reveal either constant or systematically changing values of apparent age. Constant value of apparent age in a profile can be attributed to calcareous muds precipitated from stagnant or low-energy water, and to tufas precipitated from turbulent water (oncoids, stromatolites, moss travertines) which are characterized by lack of significant correlation between δ13C and 14C age of tufa carbonate. It was found that the relation between the apparent age of tufaceous sediment and δ13C value of tufa carbonate depends on lithologic type of tufa. Phenomenological equations describing the dependence of apparent age upon δ13C are given, and applied to estimate true ages of tufas from Gliczarów (southern Poland) and Folkestone (United Kingdom).
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Pazdur, Anna, and Mieczysław F. Pazdur. "Further Investigations on 14C Dating of Calcareous Tufa." Radiocarbon 32, no. 1 (1990): 17–22. http://dx.doi.org/10.1017/s0033822200039916.

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Systematic studies on 14C dating of tufa profiles in southern Poland have resulted in developing a simple phenomenological model which enables us to estimate the reservoir correction factor of 14C dates of individual carbonate samples. We made further studies to test model assumptions and to verify relationships between the value of reservoir correction factor TR and 13C content of tufa carbonate. Two new study sites, Rudawa and Szklarka, are close to previously studied sites. Four tufa samples with associated organic fraction from ca 2000m asl in South America (Peruvian Andes) were measured to test the possible application of the developed model to tufas in different geochemical and climatic environments. Finally, a series of calcareous tufa samples from the Villers-devant-Orval profile (Belgium) were dated, although no direct comparison with organic matter dates is available for this profile.
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Pazdur, Anna, and Mieczysław F. Pazdur. "14C Dating of Calcareous Tufa from Different Environments." Radiocarbon 28, no. 2A (1986): 534–38. http://dx.doi.org/10.1017/s0033822200007682.

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14C dates of carbonate and organic matter fractions are compared with a series of calcareous tufa samples from selected sites representing different geochemical environments and associated with different bedrocks. Results obtained in this study indicate values of apparent age ranging from 940 ± 110 yr for calcareous tufas associated with Pleistocene sediments to 2000 ± 110 yr and even ca 4000 yr for tufas from sites associated with Jurassic or Cretaceous limestone. It was found also that within each of the investigated sites the value of apparent age does not change significantly with the age of the tufa layer.
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Szabo, Barney J., Charles A. Bush, and Larry V. Benson. "Uranium-Series Dating of Carbonate (Tufa) Deposits Associated with Quaternary Fluctuations of Pyramid Lake, Nevada." Quaternary Research 45, no. 3 (May 1996): 271–81. http://dx.doi.org/10.1006/qres.1996.0028.

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AbstractUranium-series dating of dense tufa deposited in a small cave, at former lake margins, and in large tufa mounds clarifies the timing of lake-level variation during the past 400,000 yr in the Pyramid Lake basin. A moderate-sized lake occasionally overflowed the Emerson Pass sill at elevation of ∼1207 m between ca. 400,000 and 170,000 and from ca. 60,000 to 20,000 yr B.P., as shown by 230Th/234U ages of the cave samples, 230Th-excess ages of tubular tufas, and average isochron-plot ages of shoreline-deposited tufas. (By comparison, modern Pyramid Lake is ∼50 m below this sill). There is a lack of tufa record during the intervening period from ca. 170,000 to 60,000 yr B.P. After ca. 20,000 yr, Pyramid Lake underwent abrupt changes in level and, based on previous 14C ages, reached its highest elevation (ca 1335 m) at ca. 14,000 yr B.P. The youngest uranium-series ages are comparable with previously reported 14C ages.
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Pazdur, Anna, Mieczysław F. Pazdur, and Joachim Szulc. "Radiocarbon Dating of Holocene Calcareous Tufa in Southern Poland." Radiocarbon 30, no. 2 (1988): 133–52. http://dx.doi.org/10.1017/s0033822200044076.

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Calcareous tufa from five sites in southern Poland, representing several most typical conditions of tufa sedimentation, were chosen for 14C, 13C, and 18O measurements. These tufas were deposited in a high-energy turbulent stream (the Racławka site), in streams with moderate but variable flow (Rzerzuśnia and Trzebienice), and in semilimnic conditions (Sieradowice site). Sediments of the Gliczarów site represent spring travertines. In all but the latter site, direct comparison of 14C dates of carbonate and organic fractions was possible, leading to an estimate of initial apparent age of carbonate sediments. Clear correlation was found between the value of initial apparent age of tufas and the hydrodynamic conditions of sedimentation. Corresponding values range from ca 3900 yr (Racławka) to 910 yr for semilimnic sediments (Sieradowice). Intermediate, almost identical values, equal to 2460 ± 200 yr and 2100 ± 160 yr, were obtained for tufas from Rzerzuśnia and Trzebienice, respectively. Detailed sedimentologic classification of tufaceous deposits is presented and some primary and secondary factors affecting the accuracy of radiocarbon dates of various types of tufas are also discussed.
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Barešić, Jadranka, Sanja Faivre, Andreja Sironić, Damir Borković, Ivanka Lovrenčić Mikelić, Russel N. Drysdale, and Ines Krajcar Bronić. "The Potential of Tufa as a Tool for Paleoenvironmental Research—A Study of Tufa from the Zrmanja River Canyon, Croatia." Geosciences 11, no. 9 (September 7, 2021): 376. http://dx.doi.org/10.3390/geosciences11090376.

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Tufa is a fresh-water surface calcium carbonate deposit precipitated at or near ambient temperature, and commonly contains the remains of macro- and microphytes. Many Holocene tufas are found along the Zrmanja River, Dalmatian karst, Croatia. In this work we present radiocarbon dating results of older tufa that was found for the first time at the Zrmanja River near the Village of Sanaderi. Tufa outcrops were observed at different levels, between the river bed and up to 26 m above its present level. Radiocarbon dating of the carbonate fraction revealed ages from modern, at the river bed, up to 40 kBP ~20 m above its present level. These ages fit well with the hypothesis that the Zrmanja River had a previous surface connection with the Krka River, and changed its flow direction toward the Novigrad Sea approximately 40 kBP (Marine Isotope Stage 3). Radiocarbon AMS dating of tufa organic residue yielded a maximum conventional age of 17 kBP for the highest outcrop position indicating probable penetration of younger organic material to hollow tufa structures, as confirmed by radiocarbon analyses of humin extracted from the samples. Stable carbon isotope composition (δ13C) of the carbonate fraction of (−10.4 ± 0.6)‰ and (−9.7 ± 0.8)‰ for the Holocene and the older samples, respectively, indicate the autochthonous origin of the carbonate. The δ13C values of (−30.5 ± 0.3)‰ and (−29.6 ± 0.6)‰ for organic residue, having ages <500 BP and >5000 BP, respectively, suggest a unique carbon source for photosynthesis, mainly atmospheric CO2, with an indication of the Suess effect in δ13C during last centuries. The oxygen isotopic composition (δ18O) agrees well with deposition of tufa samples in two stages, the Holocene (−8.02 ± 0.72‰) and “old” (mainly MIS 3 and the beginning of MIS 2) (−6.89 ± 0.34‰), suggesting a ~4 °C lower temperature in MIS 3 compared to the current one.
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He, Jinchen, Jiayuan Lin, and Yanhao Xu. "Modeling the Relationships between the Height and Spectrum of Submerged Tufa Barrage Using UAV-Derived Geometric Bathymetry and Digital Orthoimages." Sensors 21, no. 21 (October 21, 2021): 6987. http://dx.doi.org/10.3390/s21216987.

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Tufa barrages play an important role in fluviatile tufa ecosystems and sedimentary records. Quantifying the height of tufa barrage is significant for understanding the evolution and development of the Holocene tufa barrage systems. However, for submerged tufa barrages, there is no low-cost non-contact method to retrieve barrage height. Generally, it is difficult to recognize small tufa barrages by means of remotely sensed satellite data, but the combination of unmanned aerial vehicles (UAV) and Structure-from-Motion (SfM) photogrammetry makes it possible. In this study, we used a fixed-wing UAV and a consumer-grade camera to acquire images of the submerged tufa barrage in Lying Dragon Lake, Jiuzhaigou National Nature Reserve, China, and estimated the height of the tufa barrage through UAV-based photogrammetric bathymetry. On this foundation, the relationship between barrage height and its spectrum was established through band ratio analysis using UAV-derived geometric bathymetry and digital orthoimages, which provided an alternative strategy to characterize the height of submerged tufa barrages. However, the spectral characteristics of submerged tufa barrages will oscillate with changes in the environmental conditions. In future research, we will consider using a dedicated aquatic multispectral camera to improve the experimentation.
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Dissertations / Theses on the topic "Tufa"

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Conway, Charles Patrick MacMillan. "The Roman coinage from Ossaia/La Tufa." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/mq21127.pdf.

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Tweedy, Ruth Rosegrant. "Tufa-based reconstructions of Huasco Basin Lake levels." Thesis, Massachusetts Institute of Technology, 2020. https://hdl.handle.net/1721.1/127148.

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Thesis: S.B., Massachusetts Institute of Technology, Department of Earth, Atmospheric, and Planetary Sciences, May, 2020
Cataloged from the official PDF of thesis.
Includes bibliographical references (pages 55-58).
This thesis investigates the Salar del Huasco (northern Chile) as a potential site for palaeohydrological reconstructions of precipitation over the South American Altiplano, and presents a preliminary lake level chronology for the last deglaciation. Resolving the timings of past lake level highstands in the South American Altiplano will ultimately provide better understanding of what climate events force the South American Summer Monsoon (SASM) further south. Better insight into the forcing mechanisms of the SASM will improve our understanding of monsoon systems, and can be applied to refine global climate models of the region. To create this lake level chronology, tufa samples deposited at different elevations within the Salar del Huasco were dated using U/Th disequilibrium dating, and stable isotope measurements were applied to examine the past hydrology of the basin. The Salar del Huasco was found to have remained a hydrologically closed basin during highstand events, meaning lake level variations within the basin are purely driven by local precipitation-evaporation balances. Furthermore, the preliminary lake level chronology broadly agrees with the timings suggested by other palaeohydrological studies from the region, and provides support for a currently controversial lake level highstand between 120-100 ka. These results imply that the Salar del Huasco accurately reflects SASM-forced lake level histories, and should be studied further.
by Ruth Rosegrant Tweedy.
S.B.
S.B. Massachusetts Institute of Technology, Department of Earth, Atmospheric, and Planetary Sciences
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林, 誠司, 知恵 白河, 真祐瞳 三石, 和浩 小澤, 宏. 森, 俊夫 中村, サイモン ウォリス, et al. "14C Dating of Tufa Deposits Around Lake Nam CO, Tibet." 名古屋大学年代測定資料研究センター, 2011. http://hdl.handle.net/2237/16529.

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Bartruff, Anthony Lynn. "A Characterization of Lake Abert Tufa Mounds Lake Abert, Oregon." PDXScholar, 2013. https://pdxscholar.library.pdx.edu/open_access_etds/1061.

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A series of tufa mounds is found within the northern basin of Lake Abert, located within southeastern Oregon. The mounds have been divided into 3 main groups and 1 sub-group (A1, A2, B, and C) based upon spatial and textural considerations. Mound groups appear at two different elevations: the 1310 meter elevation (Groups A2, B, and C), and the 1318 meter elevation (Group A1). Published carbon age dating of the Lake Abert 1325 meter strandline and the 1310 meter strandline indicates that the mounds were formed during the Late Pleistocene/Early Holocene. Facies analysis and mineralogical analysis of the mounds indicates that the mounds were primarily formed subaqueously during a lake regression, supporting oxygen isotope data from previous researchers. Magnetometer data within Groups A1 and A2 suggests that the mounds are associated with a series of magnetic lows which are oriented in joint sets (NW-SE, and N-S) which match the orientation of faulting within the region. While there appears to be another early mound building episode, no direct evidence confirms this.
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Canaris, John Pano. "The tufa deposits of Limestone Gorge, Gregory National Park, Northern Territory /." Title page, contents and abstract only, 1993. http://web4.library.adelaide.edu.au/theses/09SB/09sbc213.pdf.

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Thesis (B. Sc.(Hons.))--University of Adelaide, Dept. of Geology and Geophysics, 1994.
Sheet SE/52-3 international index. Six coloured plates have overlays. Includes bibliographical references (leaves 23-25).
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Meyrick, Richard Andrew. "The biostratigraphy and dating of Holocene tufa successions in NW Europe." Thesis, University of Cambridge, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.624275.

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Saunders, Paul. "Can tufa Mg/Ca ratios be used as a palaeoclimate proxy?" Thesis, University of Hull, 2012. http://hydra.hull.ac.uk/resources/hull:6833.

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Priddy, Jeremy Daniel-John. "As Tufa to Sapphire| Gendering the Roles of Medieval Women in Combat." Thesis, The George Washington University, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=1558108.

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The purpose of this paper is to explore medieval gender roles through the discourse and conduct of warfare. Some modern historians such as John Keegan have maintained that medieval warfare was a masculine activity that precluded female participation in all but the most exceptional cases. Megan McLaughlin asserted that the change from a domestic to public model of warfare resulted in a disenfranchisement of women after the eleventh century. This paper shows that medieval warfare was not male exclusive, and women's active participation throughout the period was often integral to a combat's outcome. By analyzing both the military activities of female combatants and changes in academic dialogues over war in the eleventh to the fifteenth centuries, an ongoing disparity unfolds between the ideological gendering of warfare and its actual practice.

This disparity informed an accepted norm in which women were seen as inherently weak and unfit for combat, requiring a "masculinization" of women who successfully engaged in battle. This in turn led to the establishment of the virago image of female warriors; paradoxically, women who therefore defied the normative expectation of feminine behavior could be held in high regard for their masculine virtues. At the same time, the contributions of individual women to warfare are often left with minimal mention or treated as anomalous by some later chroniclers.

The paper is divided into seven sections. Part I explores the eleventh century military career of Matilda of Canossa, and subsequent treatment of her activities by apologists and canonical reformers. Part II discusses the means by which women had access to military activity in a changing climate of gendered social roles, through marriage, inheritance, and the influence of the Pax Dei movement. Part III discusses the military activity of women during the Crusades, and the differences in how that activity was noted in Western versus Islamic sources.

Parts IV - VI discuss the thirteenth century academic dialogues over women's participation in combat in the wake of the Crusades, through the work of Giles of Rome and Ptolemy of Lucca. As well, it analyzes the enfolding of knighthood as a construct of feudal vassalage into the noble class, and the changing access to military orders granted to women as armies became professionalized. Part VII looks at the formation of a new kind of war rhetoric and an attempt to resolve the disparity between the theory and practice of warfare in regards to women through the fifteenth century work of Christine de Pizan.

The conclusions of this work are that war may be understood to be a masculine activity, yet is not male exclusive. Writers and war chroniclers were forced to complicate gendered social norms in order to justify or refute women engaging in combat. This only resulted in a continued re-evaluation of the proper ideological place of women in war, and was not necessarily reflective of a change in the actual circumstances or frequency with which women took part.

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Willing, M. J. "The biostratigraphy of Flandrian tufa deposits in the Cotswold and Mendip districts." Thesis, University of Sussex, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.371206.

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Oliveira, Emiliano Castro de. "Tufas calcárias da Serra da Bodoquena, MS." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/44/44141/tde-05062009-112215/.

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Aflorando abundantemente nas drenagens da Serra da Bodoquena, região sudoeste do Estado de Mato Grosso do Sul, os depósitos de tufas calcárias, descritos como a porção superior da Formação Xaraiés, representam o mais notável depósito do tipo no Brasil, devido à variedade de formas. Sendo a maior atração do pólo eco-turístico de Bonito, MS, as tufas calcárias apresentam-se sob formas de barragens, cachoeiras e depósitos de micritos inconsolidados, que por sua vez geram as piscinas naturais e quedas dágua tão procuradas pelos turistas. Mesmo com tamanha importância, tal rocha não havia recebido um estudo aprofundando, que contemplasse sedimentologia, estratigrafia e geomorfologia. Através de criteriosa revisão bibliográfica, trabalhos em campo e análises laboratoriais, pôde-se obter um panorama da Formação Xaraiés na Serra da Bodoquena. Nesta região, observa-se que a formação, assentada diretamente sobre os calcários e dolomitos do Grupo Corumbá, sendo composta por um nível basal de calcretes, de tipo pedogenético e freático, sobreposto por um pacote de tufas micríticas (micrito inconsolidado), com grande quantidade de gastrópodes, distribuídos amplamente e aflorando em todas as planícies da região. Por fim temos os afloramentos de tufas calcárias do tipo fitohermal, compondo barragens e cachoeiras nas drenagens locais. Acredita-se que a deposição dos micritos ocorreu em ambiente lacustre, o que permitiu um depósito amplo e homogêneo, que posteriormente, em clima úmido, serviu de área fonte, juntamente com os carbonatos do Grupo Corumbá, para a geração das tufas fitohermais. A correlação estratigráfica dos depósitos de tufas calcárias estudados apontam para dois períodos de clima semi-árido a árido no Holoceno, que permitiram a formação e a alteração (calcretização) de depósitos, refletido na base da Formação Xaraiés, e o período climático recente, úmido, a formação das tufas fitohermais, no topo da formação. A ocorrência de lentes micríticas no sul do Pantanal pode significar que esta região também esteve exposta às dinâmicas climáticas vistas na Serra da Bodoquena. Estas constatações demonstram a alta variação climática da região, representada por depósitos que são pequenos e frágeis, mas dotados de significados genéticos indubitáveis.
Crop out abundantly in the Bodoquena Ridge drainages, southwest of Mato Grosso do Sul (MS) state, deposits of calcareous tufa were described as the top portion of Xaraiés Formation, representing the most notable deposit of this type in Brazil, due to the variety of forms. As the greatest attractiveness of Bonito, MS, an eco-tourism center, the calcareous tufa were presented in form of dams, waterfalls and deposits of micritic sediments, which generate natural pools and waterfalls so looked by tourists. Even with such importance, this region had not received a deep study, with sedimentology, stratigraphy and geomorphology approach. An accurate bibliographic review was done, and with field work and laboratory analyzes this work could obtain a panorama of the Xaraiés Formation in Bodoquena Ridge. In this region, can be noted that Xaraiés Formation goes directly over the limestone and dolomite of the Corumbá Group, and were composed by a basal layer of pedogenetic/groundwater calcrete, superimposed by a package of micritic sediments (micritic tufa), with a large amount of gastropods, which were widely distributed, cropping out in all plains of the region. Finally, we have the occurrences of calcareous tufa, fitohermal type, drawing dams and waterfalls in the regional drainages. It has believed that the deposition of lacustrine micritic sediments have occurred in an environment which were enabled a broad and homogeneous deposits. Subsequently, in a moister climate these sediments served as a source area, together with the limestone of the Corumbá Group, for the generation of fitohermal tufa. The stratigraphic correlation of the studied calcareous tufa deposits point to two periods of semi-arid/arid climate in Holocene, which allowed the calcretization. Those were reflected on the bottom of the Xaraiés Formation, and a recent wet climatic period, represented by the fitohermal tufa at the top of the formation. The occurrence of micritic lens in the southern Pantanal may mean that this region has also been exposed to the weather dynamics viewed in the Bodoquena Ridge. These findings show the high variation of climate in this region, represented by deposits, which are small and fragile, but gifted with unquestionable genetic meanings.
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Books on the topic "Tufa"

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Magalhães, Ana Maria. Tufa o nos mares da China. Lisboa: Editorial Caminho, 1997.

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Growing alpines in raised beds, troughs, and tufa. London: B.T. Batsford, 1991.

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illustrator, Farré Lluís 1970, ed. Tako Retaco y el señor Tufa en el desierto. Barcelona: Beascoa, 2009.

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Noorhadi. Mineralogi dan morfologi tanah yang berkembang dari tufa andesitik pada penggunaan tanah yang berbeda. Surakarta: Fakultas Pertanian, Universitas Sebelas Maret, 1997.

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Tu fa shi jian ying dui yu gong gong wei ji guan li: Tufa shijian yingdui yu gonggong weiji guanli. Beijing Shi: Guang ming ri bao chu ban she, 2009.

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Ling, Gan, and Yu Yabo, eds. Ling dao zhe ying dui tu fa shi jian de li lun yu shi wu: Lingdaozhe yingdui tufa shijian de lilun yu shiwu. Beijing: Ren min chu ban she, 2005.

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Tu fa huan jing shi jian ying ji chu zhi fa lü wen ti yan jiu: Tufa huanjing shijian yingji chuzhi falü wenti yanjiu. Beijing Shi: Zhi shi chan quan chu ban she, 2012.

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Kumāra, Siṃha Aśoka. Tuma pāim̐: Tuma pain. Bhubaneswar: Timepass, 2010.

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Vargas, Antonio José Rivadeneira, and Carlos Helver Barrera Martínez. Tuta. Tunja, Boyacá [Colombia]: Academia Boyacense de Historia, Gobernación de Boyacá, 2010.

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CANNON, Ace. Tuff. Brentford: Demon Records, 1988.

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Book chapters on the topic "Tufa"

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Kano, Akihiro. "Tufa, Freshwater." In Encyclopedia of Geobiology, 889–91. Dordrecht: Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-1-4020-9212-1_211.

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Goudie, Andrew, and Heather Viles. "The Naukluft Mountains and their Tufa Cascades." In World Geomorphological Landscapes, 133–36. Dordrecht: Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-017-8020-9_20.

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Abbaspour, Aiyoub, and Burak F. Tanyu. "Parameters Affecting Tufa Precipitation from Recycled Concrete Aggregate." In Lecture Notes in Civil Engineering, 71–81. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-51354-2_7.

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Parmeggiani, A., P. H. Anborgh, D. Canceill, E. Jacquet, J. Jonák, M. Merola, K. K. Mortensen, and G. W. M. Swart. "Elongation Factor Tu Mutants and Site-Directed Mutagenesis of tufA." In Springer Series in Molecular Biology, 672–85. New York, NY: Springer New York, 1986. http://dx.doi.org/10.1007/978-1-4612-4884-2_39.

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Dramis, Francesco, and Giandomenico Fubelli. "Tufa Dams in Tigray (Northern Ethiopia) as Late Pleistocene—Holocene Climate Proxies." In World Geomorphological Landscapes, 201–11. Dordrecht: Springer Netherlands, 2015. http://dx.doi.org/10.1007/978-94-017-8026-1_11.

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Van Frausum, Anne, and Karel Wouters. "Ostracoda from Holocene calcareous tufa deposits in southern Belgium: a palaeoenvironmental analysis." In Ostracoda and Global Events, 505–11. Dordrecht: Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-1838-2_39.

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Kele, Sándor, and Barbara Bódai. "Age, Depositional Environment, and Geochemistry of Freshwater Carbonates (Travertine, Tufa) from Hungary." In Cave and Karst Systems of Hungary, 513–33. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-92960-2_18.

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Dramis, Francesco, and Giandomenico Fubelli. "Limestone, Karst and Tufa Dams in the Western Part of the Mekelle Outlier." In Geo-trekking in Ethiopia’s Tropical Mountains, 107–19. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-04955-3_7.

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Idriss, Saber, Samir Bouaziz, and Soumyajit Mukherjee. "Travertine-Tufa Deposition in Relation with Gafsa-Jeffara Fault System: Implication on Fluid-Flow (Southern Tunisia)." In The Structural Geology Contribution to the Africa-Eurasia Geology: Basement and Reservoir Structure, Ore Mineralisation and Tectonic Modelling, 79–83. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-030-01455-1_17.

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Tsymbalyuk, Valentyna, Anatoliy Woloshuk, and Igor Kobasa. "Sorption of Ammonium Cations and Heavy Metal Ions from the Natural Artesian Waters with the Basalt Tufa Samples." In Advanced Water Supply and Wastewater Treatment: A Road to Safer Society and Environment, 325–28. Dordrecht: Springer Netherlands, 2010. http://dx.doi.org/10.1007/978-94-007-0280-6_32.

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Conference papers on the topic "Tufa"

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McBride, John H., David L. Faust, W. Spencer Guthrie, and Stephen T. Nelson. "Mapping thermal tufa deposits using GPR." In 2010 13th International Conference on Ground Penetrating Radar (GPR 2010). IEEE, 2010. http://dx.doi.org/10.1109/icgpr.2010.5550134.

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Dapkus, Ryan T., and James R. Mayer. "GEOCHEMISTRY OF A TUFA DEPOSIT, PIGEON MOUNTAIN, GEORGIA." In Joint 69th Annual Southeastern / 55th Annual Northeastern GSA Section Meeting - 2020. Geological Society of America, 2020. http://dx.doi.org/10.1130/abs/2020se-344680.

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Olson, Kristian, Christine Y. Chen, Brian Stewart, David McGee, and Tim Lowenstein. "GEOCHEMISTRY AND PALEOHYDROLOGY OF SEARLES LAKE (CALIFORNIA) TUFA." In GSA Connects 2022 meeting in Denver, Colorado. Geological Society of America, 2022. http://dx.doi.org/10.1130/abs/2022am-383182.

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de Wet, Carol B., Elizabeth Driscoll, Linda Godfrey, and Andrew P. de Wet. "QUATERNARY FRESHWATER TUFA FACIES, CALAMA BASIN, ATACAMA DESERT, CHILE." In Joint 69th Annual Southeastern / 55th Annual Northeastern GSA Section Meeting - 2020. Geological Society of America, 2020. http://dx.doi.org/10.1130/abs/2020se-344946.

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Karaman, Mehmet�Erkan. "GEOLOGY�OF�THE�ANTALYA�TUFA�AND�ITS�EFFECTS�ON�SOILS." In SGEM2012 12th International Multidisciplinary Scientific GeoConference and EXPO. Stef92 Technology, 2012. http://dx.doi.org/10.5593/sgem2012/s01.v1013.

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Engelbart, Tyler W., and Douglas Gouzie. "INVESTIGATION OF TUFA ON THE SPRING RIVER IN NORTHERN ARKANSAS." In Joint 53rd Annual South-Central/53rd North-Central/71st Rocky Mtn GSA Section Meeting - 2019. Geological Society of America, 2019. http://dx.doi.org/10.1130/abs/2019sc-327207.

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B. Sousa, W., J. A. Soares, and L. A. Freire. "Análise Petrofísica da Tufa Carbonática do Afloramento Felipe Guerra, Bacia Potiguar." In Simpósio Brasileiro de Geofísica. Sociedade Brasileira de Geofísica, 2014. http://dx.doi.org/10.22564/6simbgf2014.060.

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Engelbart, Tyler W., Douglas R. Gouzie, and Kevin L. Mickus. "INVESTIGATION OF TUFA DEPOSITS IN THE SPRING RIVER IN NORTHERN ARKANSAS." In GSA Annual Meeting in Phoenix, Arizona, USA - 2019. Geological Society of America, 2019. http://dx.doi.org/10.1130/abs/2019am-335817.

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Marić, Ivan, Ante Šiljeg, Neven Cukrov, and Fran Domazetović. "Quantifying Tufa Growth Rates (TGRs) using Structure-from-Motion (SfM) Photogrammetry." In 6th International Conference on Geographical Information Systems Theory, Applications and Management. SCITEPRESS - Science and Technology Publications, 2020. http://dx.doi.org/10.5220/0009457202250232.

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Kwokal, Zeljko. "MERCURY CONTENTS IN WATER, SEDIMENT AND TUFA IN KARSTIC KRKA RIVER, CROATIA." In 18th International Multidisciplinary Scientific GeoConference SGEM2018. Stef92 Technology, 2018. http://dx.doi.org/10.5593/sgem2018/3.1/s12.062.

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Reports on the topic "Tufa"

1

Bartruff, Anthony. A Characterization of Lake Abert Tufa Mounds Lake Abert, Oregon. Portland State University Library, January 2000. http://dx.doi.org/10.15760/etd.1061.

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Mathur, Shishur, and Ralph Robinson. Transportation Utility Fee to Fund Transit in California. Mineta Transportation Institute, June 2022. http://dx.doi.org/10.31979/mti.2022.2032.

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Abstract:
Public transit is a key tool to reduce greenhouse gas (GHG) emissions to combat climate change; improve safety for pedestrians, cyclists, and drivers; and expand accessibility and mobility for all. However, we can only realize this potential by making sufficient investments to provide transit service levels that attract and retain greater ridership. To help with this needed investment, a handful of local governments have turned to transportation utility fees (TUFs), primarily collected as a monthly charge on customers' utility bills or property tax bills. While more widely used to support street maintenance, this study identifies six case studies where TUF revenues have been used to support transit or active transportation modes. This study closely examines the legal enabling environment for TUFs, the fee calculations methodology, the eligible uses, and other critical details about how these fees work. This study concludes by investigating the feasibility of employing TUFs in California to support public transit and meet the state's GHG emissions reduction goals.
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Bazan, F., and J. H. Rego. Tuff reaction vessel experiment. Office of Scientific and Technical Information (OSTI), June 1986. http://dx.doi.org/10.2172/59933.

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Author, Not Given. Environmental assessment of remedial action at the Tuba City uranium mill tailings site, Tuba City, Arizona. Office of Scientific and Technical Information (OSTI), November 1986. http://dx.doi.org/10.2172/7255552.

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T.A. Ghezzehei, P.F. Dobson, J.A. Rodriguez, and P.J. Cook. Infiltration and Seepage Through Fractured Welded Tuff. Office of Scientific and Technical Information (OSTI), June 2006. http://dx.doi.org/10.2172/893843.

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Zimmerman, R. M., R. A. Bellman, Jr., K. L. Mann, D. P. Zerga, M. Fowler, and J. R. Johnson. G-Tunnel Welded Tuff Mining experiment evaluations. Office of Scientific and Technical Information (OSTI), December 1988. http://dx.doi.org/10.2172/137490.

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Zimmerman, R. M., R. A. Jr Bellman, K. L. Mann, and D. P. Zerga. G-tunnel welded tuff mining experiment preparations. Office of Scientific and Technical Information (OSTI), January 1991. http://dx.doi.org/10.2172/137971.

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Viani, B. E., and L. Carman. Transport of soluble species through tuff core. Office of Scientific and Technical Information (OSTI), December 1997. http://dx.doi.org/10.2172/641051.

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Piscitello, D. Use of ISO CLNP in TUBA Environments. RFC Editor, December 1993. http://dx.doi.org/10.17487/rfc1561.

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Martin, R. J. III, P. J. Boyd, R. W. Haupt, and R. H. Price. Anisotropy of the Topopah Spring Member Tuff. Office of Scientific and Technical Information (OSTI), July 1992. http://dx.doi.org/10.2172/140755.

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