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Journal articles on the topic 'Stromatolithes'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 May 2024

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1

Legrand, Philippe, Pierre Debriette, Stephen Durif, and Ronny Roessler. "Flore autunienne silicifiée de Gipcy (permien inferieur du bassin de Bourbon-l’Archambault, Allier, Massif Central, France)." Annales de la Société géologique du Nord - (2e Série), Tome XXX, no. 30 (December 15, 2023): 79–90. http://dx.doi.org/10.54563/asgn.2288.

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La flore autunienne de Gipcy (Permien inférieur du bassin de Bourbon-l'Archambault) est pour la première fois décrite et figurée. Cette flore bien conservée comprend essentiellement des stromatolithes silicifiés, des tiges perminéralisées de Calamites Suckow identifiées comme Arthropitys Goeppert, des racines de Psaronius Cotta, et des morceaux de bois pycnoxyliques silicifiés Agathoxylon Hartig. Parmi les Agathoxylon, des tiges à structure conservée ont été rapprochées des Cordaites et des Conifères.Des valves d'ostracodes ont aussi été observées au voisinage des laminations stromatolithiques

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2

Brook, George A., A. Cherkinsky, L. Bruce Railsback, Eugene Marais, and Martin H. T. Hipondoka. "14C Dating of Organic Residue and Carbonate from Stromatolites in Etosha Pan, Namibia: 14C Reservoir Effect, Correction of Published Ages, and Evidence of >8-m-Deep Lake During the Late Pleistocene." Radiocarbon 55, no. 3 (2013): 1156–63. http://dx.doi.org/10.1017/s0033822200048062.

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Lacustrine stromatolites are layered accretionary structures formed in shallow water by cyanobacteria. They are a precise indicator of high lake limits and their morphology and structure provide an insight into paleoenvironments of the time. Previous research on lacustrine stromatolites from Etosha Pan in Namibia based on radiocarbon ages of carbonates were close to the limit of the method and did not account for any possible 14C reservoir effect. The ages were used to suggest that the basin was not extensively flooded during the last 40,000 yr. To assess the reservoir effect, the age characte

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3

Rakhmanova, А. V. "History of the study of Karelia Paleoproterozoic stromatolites and their display at the Museum of Precambrian Geology, Petrozavodsk." Vestnik of Geosciences 4 (2021): 25–31. http://dx.doi.org/10.19110/geov.2021.4.4.

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The paper deals with the history of stromatolite studies in the Republic of Karelia and the compiling of a stromatolite collection at the Museum of Precambrian Geology, IG, KarRC, RAS, Petrozavodsk. Major stages in the study of Karelia’s Proterozoic stromatolites are presented, changes in the point of view of their origin are assessed and the exposition «Karelia’s and worldwide stromatolites» is described for the first time. Analysis of the history of Karelia’s widespread and accessible stromatolites and a review of the stromatolite collection at the museum are of scientific and educational in

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Papineau, Dominic, Jeffrey J. Walker, Stephen J. Mojzsis, and Norman R. Pace. "Composition and Structure of Microbial Communities from Stromatolites of Hamelin Pool in Shark Bay, Western Australia." Applied and Environmental Microbiology 71, no. 8 (2005): 4822–32. http://dx.doi.org/10.1128/aem.71.8.4822-4832.2005.

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ABSTRACT Stromatolites, organosedimentary structures formed by microbial activity, are found throughout the geological record and are important markers of biological history. More conspicuous in the past, stromatolites occur today in a few shallow marine environments, including Hamelin Pool in Shark Bay, Western Australia. Hamelin Pool stromatolites often have been considered contemporary analogs to ancient stromatolites, yet little is known about the microbial communities that build them. We used DNA-based molecular phylogenetic methods that do not require cultivation to study the microbial d

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5

Antropova, E. "A new location of stromatolites in the Middle Timan: their morphological and structural features." Vestnik of geosciences, no. 12 (February 21, 2024): 24–29. http://dx.doi.org/10.19110/geov.2023.12.3.

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The paper presents the results of macroscopic and microscopic study of Riphean stromatolites of the Pavyuga Formation from a new locality on the left bank of the Vorykva River (Middle Timan). The stromatolites form a stromatolite bioherm. The microstructure of the stromatolite assemblages is characterised by layering of different composition and granularity; traces of organogenic formations of clotted and filamentous type were found in microgranular interlayers. Numerous traces of secondary transformations, such as pyritization, dolomitization on shells, and fenestra formation, were noted. The

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Villafañe, Patricio Guillermo, Carlos Cónsole-Gonella, Paolo Citton, Ignacio Díaz-Martínez, and Silvina de Valais. "Three-dimensional stromatolites from Maastrichtian–Danian Yacoraite Formation, Argentina: modelling and assessing hydrodynamic controls on growth patterns." Geological Magazine 158, no. 10 (2021): 1756–72. http://dx.doi.org/10.1017/s0016756821000315.

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AbstractStromatolites are biogenic sedimentary structures formed by the interplay of biological (microbial composition) and environmental factors (local hydrodynamic conditions, clastic input and/or water chemistry). Well-preserved, three-dimensional (3D) fossil stromatolites are key to assessing the environmental factors controlling their growth and resulting morphology in space and time. Here, we report the detailed analysis of well-exposed, highly informative stromatolite build-ups from a single stratigraphic horizon within the Maastrichtian–Danian Yacoraite Formation (Argentina). This stud

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7

Douglas, Susanne, Meredith E. Perry, William J. Abbey, Zuki Tanaka, Bin Chen, and Christopher P. McKay. "The structure and chemical layering of Proterozoic stromatolites in the Mojave Desert." International Journal of Astrobiology 14, no. 3 (2015): 517–26. http://dx.doi.org/10.1017/s1473550415000026.

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AbstractThe Proterozoic carbonate stromatolites of the Pahrump Group from the Crystal Spring formation exhibit interesting layering patterns. In continuous vertical formations, there are sections of chevron-shaped stromatolites alternating with sections of simple horizontal layering. This apparent cycle of stromatolite formation and lack of formation repeats several times over a vertical distance of at least 30 m at the locality investigated. Small representative samples from each layer were taken and analysed using X-ray diffraction (XRD), X-ray fluorescence (XRF), environmental scanning elec

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8

Riding, Robert. "Abiogenic, microbial and hybrid authigenic crusts: components of Precambrian stromatolites." Geologia Croatica 61, no. 2-3 (2008): 73–103. http://dx.doi.org/10.4154/gc.2008.10.

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Authigenic seafloor carbonate crusts include fenestrate microbialite, thrombolite, and four types here designated Fine-grained Crust, Sparry Crust, Hybrid Sparry Fine-grained Crust, and Sparry Crust plus Coarse Grains. Each of the latter four types includes at least some layered examples that have generally been regarded as stromatolites. Recognition and interpretation of these various deposits assists understanding of stromatolite development. Sparry Crust is common in the Late Archaean-Mesoproterozoic. It includes botryoidal fans and other crystal pseudomorphs, microdigitate stromatolite, de

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9

Keim, Carolina N., Hélisson Nascimento dos Santos, Carolina Souza Santiago, et al. "Microstructure and mineral composition of Holocene stromatolites from Lagoa Vermelha, a hypersaline lagoon in Brazil: Insights into laminae genesis." Journal of Sedimentary Research 90, no. 8 (2020): 887–905. http://dx.doi.org/10.2110/jsr.2020.40.

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ABSTRACT Stromatolites are domes, columns, or nearly flat crusts of laminated sedimentary rocks, usually consisting of Ca-Mg carbonates. Stromatolites result from lithification of microbial mats, which are benthic microbial ecosystems where microorganisms arrange themselves in layers according to their physiology. Despite a century of research, the hypothesis of stromatolite genesis by lithification of microbial mats remains controversial, and a convincing explanation for how stromatolites arise from microbial mats is still lacking. In this work, we analyze in detail a stromatolite from Lagoa

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10

Hofmann, H. J., and A. Davidson. "Paleoproterozoic stromatolites, Hurwitz Group, Quartzite Lake area, Northwest Territories, Canada." Canadian Journal of Earth Sciences 35, no. 3 (1998): 280–89. http://dx.doi.org/10.1139/e97-103.

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Decimetric to metric domal stromatolites with constituent ministromatolites characterize reddish, 13C-enriched dolostones in the Watterson Formation of the Quartzite Lake area west of Hudson Bay. They provide paleontologic support for a correlation with the only other known early Paleoproterozoic stromatolite occurrences in North America: the Kona Formation of Michigan, and the Nash Formation in southern Wyoming. They also are similar to stromatolites in probable coeval Jatulian carbonates in Karelia on the Baltic Shield, and possibly to stromatolites in the Hutuo Group in China.

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11

Shiraishi, Fumito, Yusaku Hanzawa, Jiro Asada, Leonardo Fadel Cury, and Anelize Manuela Bahniuk. "Decompositional processes of microbial carbonates in Lagoa Vermelha, Brazil." Journal of Sedimentary Research 93, no. 3 (2023): 202–11. http://dx.doi.org/10.2110/jsr.2022.053.

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ABSTRACT In Lagoa Vermelha, Brazil, a lagoonal stromatolite and a saltpan microbial mat are investigated to understand the influence of environmental changes on the decomposition of microbial carbonates. The lagoonal stromatolite, composed mainly of magnesian calcite and aragonite, is developed on a dolomite-containing carbonate crust. While most stromatolites are eroded to the water surface level, some smaller, green stromatolites below the water surface retain a domal shape. The domal stromatolite surface is dominated by endolithic cyanobacteria with conspicuous microborings. In addition, mi

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Smith, Alan, Andrew Cooper, Saumitra Misra, Vishal Bharuth, Lisa Guastella, and Riaan Botes. "The extant shore platform stromatolite (SPS) facies association: a glimpse into the Archean?" Biogeosciences 15, no. 7 (2018): 2189–203. http://dx.doi.org/10.5194/bg-15-2189-2018.

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Abstract. Shore platform stromatolites (SPS) were first noted at Cape Morgan on the south-east African seaboard. Since then they have been found growing discontinuously in rocky peritidal zones along the entire southern African seaboard. They have also been found on the southwest Australian coast, at Giant's Causeway in Northern Ireland, and more recently at Harris on the Scottish Hebridean Atlantic coast. In this paper SPS occurrence and SPS potential as analogues for Precambrian fossil stromatolites, as well as potential stromatolite occurrences in shore platform regions on Mars, are assesse

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Silva, Loreine Hermida da Silva e., Anderson Andrade Cavalcanti Iespa, and Cynthia Moreira Damazio Iespa. "Composição dos estromatólitos estratiformes da lagoa Salgada, Rio de Janeiro, Brasil." Anuário do Instituto de Geociências 31, no. 2 (2008): 42–49. http://dx.doi.org/10.11137/2008_2_42-49.

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Lagoa Salgada is situated in the north coast of State of Rio de Janeiro, between the districts of Campos dos Goitacazes and São João da Barra, some 41º00'30" W and 21º54'10"S. In the margins of the lagoon the presence of recent stromatolitic constructions was verified. The stromatolite may be defined as lithifying biosedimentary structure, growing through of sediment blade trapping by the carbonate precipitation as result of microbian organism activity. The aim of this study was to characterize the cyanobacteria assemblage in stratiform stromatolites found on the floor of lagoa Salgada. Within

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14

Peyrot, Bernard, and R. Oslisly. "Les grottes à stromatolithes du Sud Gabon : des sites paléontologiques exceptionnels (province de la Ngounié)." Karstologia : revue de karstologie et de spéléologie physique 52, no. 1 (2008): 17–20. http://dx.doi.org/10.3406/karst.2008.2633.

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15

Lyutikov, Andrew. "Paleoproterozoic stromatolites Segosia columnaris and Sundosia mira of the Eastern part of the Fennoscandian Shield: microstructure and 3D modeling." Vestnik of geosciences, no. 3 (May 15, 2024): 15–19. http://dx.doi.org/10.19110/geov.2024.3.2.

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The purpose of this study is to study the microstructure and 3D modeling of Paleoproterozoic stromatolites Segosia columnaris and Sundosia mira in the eastern part of the Fennoscandian shield (Karelian craton). The premise of the study is the extensive paleontological material collected by researchers in the 1950s and 1980s. Modern methods, including SEM analysis, 3D modeling, and the results of Raman spectroscopy are used. As a result of studying the microstructure of stromatolites, possible remnants of cyanobacteria involved in the formation of these structures were identified, which potenti

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16

Riding, Robert, Stanley M. Awramik, Barbara M. Winsborough, Karen M. Griffin, and Robert F. Dill. "Bahamian giant stromatolites: microbial composition of surface mats." Geological Magazine 128, no. 3 (1991): 227–34. http://dx.doi.org/10.1017/s001675680002207x.

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AbstractSubtidal columnar stromatolites up to 2.5 m high near Lee Stocking Island in the Exuma Cays, Bahamas, have surface mats approximately equally composed of algae and cyanobacteria. The stromatolites are composed of fine–medium oöid and peloid sand. This sediment is supplied to the growing stromatolite surfaces by strong tidal currents which lift grains into suspension and sweep migrating dunes over the columns. The algae include an unidentified filamentous chlorophyte, and numerous diatom species mostly belonging to Mastogloia, Nitzschia and Navicula. The dominant cyanobacteria are two o

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17

Bosak, Tanja, Giulio Mariotti, Francis A. MacDonald, J. Taylor Perron, and Sara B. Pruss. "Microbial Sedimentology of Stromatolites in Neoproterozoic Cap Carbonates." Paleontological Society Papers 19 (October 2013): 51–76. http://dx.doi.org/10.1017/s1089332600002680.

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Stromatolite shapes, sizes, and spacings are products of microbial processes and interactions with topography, sedimentation, and flow. Laboratory experiments and studies of modern microbial mats and sediments can help reconstruct processes that shaped some typical stromatolite forms and some atypical microbially influenced sediments from Neoproterozoic cap carbonates. Studies of modern, cohesive microbial mats indicate that microbialaminite facies in the lower Rasthof Formation (Cryogenian) formed in the presence of very low flow and were not deformed by strong waves or currents. Giant wave r

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18

HELLWIG, ALEXANDRA, STEFFEN TRÜMPER, RONNY RÖßLER, and MICHAEL KRINGS. "FRESHWATER STROMATOLITES FROM AN EARLY PERMIAN WETLAND (MANEBACH, THURINGIAN-FOREST BASIN, GERMANY): STRUCTURE, DEVELOPMENT, AND PALEOENVIRONMENTAL CONTEXT." Palaios 38, no. 9 (2023): 353–70. http://dx.doi.org/10.2110/palo.2022.049.

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Abstract Fossil stromatolites enclosing structurally preserved land plant remains have rarely been documented and studied in detail. Permineralized woody Tylodendron sp. conifer axes (slender stems, branches) from a lacustrine sedimentary sequence in the lower Permian fossil Lagerstätte of Manebach (Thuringian-Forest Basin, central Germany) are frequently surrounded by stromatolites that consist of successive, usually asymmetrical microbial layers. The stromatolites show various growth forms ranging from laminar to palisadic. They developed in stagnant water from microbial overgrowth dominated

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Kaya, Mustafa, Belgin Aydin Yildirim, Mustafa Kumral, and Ahmet Sasmaz. "Trace and Rare Earth Element (REE) Geochemistry of Recently Formed Stromatolites at Lake Salda, SW Turkey." Water 15, no. 4 (2023): 733. http://dx.doi.org/10.3390/w15040733.

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Stromatolites are the oldest recognized fossil recordings of life on Earth. Therefore, their study of them represents one of the most interesting topic that investigates the physio-chemical environmental conditions (formations and precipitations) at which the stromatolites formed. This work deals with the rare earth elements (REEs) geochemical characteristics and the redox-sensitive trace elements behavior of the stromatolites newly formed in Salda Lake, a closed system alkaline lake surrounded by serpentinite rocks in SW Turkey. The representative stromatolite samples collected from Salda Lak

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Sisodia, M. S. "Impact during the proterozoic era possibly inundated the earth with phosphorus." International Journal of Astrobiology 8, no. 3 (2009): 187–91. http://dx.doi.org/10.1017/s1473550409004480.

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AbstractThe stromatolites of the Precambrian Aravalli Supergroup outcropping around Udaipur, Rajasthan, India are classified into two distinct lithofacies: the older carbonate stromatolites facies and the younger phosphate-bearing stromatolite facies. Phosphate-bearing stromatolites of the same age have been reported from China, Russia and Australia. The phosphate-bearing stromatolites of Udaipur show fossil cyanobacteria. These cyanobacteria grew luxuriantly in the absence of any competitors and accumulated abnormal amounts of phosphorus from the novo phosphorus-rich environment, eventually f

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Caudwell, Christiane, Jacques Lang, and André Pascal. "Etude expérimentale de la lamination des stromatolithes à Rivularia haematites en climat tempéré: édification des lamines micritiques." Comptes Rendus de l'Académie des Sciences - Series IIA - Earth and Planetary Science 324, no. 11 (1997): 883–90. http://dx.doi.org/10.1016/s1251-8050(97)82501-3.

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22

ANDREWS, S. D., and N. H. TREWIN. "Palaeoenvironmental significance of lacustrine stromatolite forms from the Middle Old Red Sandstone of the Orcadian Basin." Geological Magazine 151, no. 3 (2013): 414–29. http://dx.doi.org/10.1017/s0016756813000290.

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AbstractThe form of microbialite accumulations is largely the product of environmental processes and microbial activity. Recent work has largely concentrated on the identification and classification of microbialites with little attention being paid to their environmental significance. This study describes the environmental distribution of the varied stromatolite forms recorded from the Middle Old Red Sandstone sequences of the Orcadian Basin. Comparisons are made with Triassic examples from East Greenland and modern microbialite accumulations. The Middle Old Red Sandstone of Northern Scotland

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Lee, Jeong-Hyun, and Robert Riding. "Keratolite–stromatolite consortia mimic domical and branched columnar stromatolites." Palaeogeography, Palaeoclimatology, Palaeoecology 571 (June 2021): 110288. http://dx.doi.org/10.1016/j.palaeo.2021.110288.

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Cuerno, R., C. Escudero, J. M. García-Ruiz, and M. A. Herrero. "Pattern formation in stromatolites: insights from mathematical modelling." Journal of The Royal Society Interface 9, no. 70 (2011): 1051–62. http://dx.doi.org/10.1098/rsif.2011.0516.

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To this day, computer models for stromatolite formation have made substantial use of the Kardar–Parisi–Zhang (KPZ) equation. Oddly enough, these studies yielded mutually exclusive conclusions about the biotic or abiotic origin of such structures. We show in this paper that, at our current state of knowledge, a purely biotic origin for stromatolites can neither be proved nor disproved by means of a KPZ-based model. What can be shown, however, is that whatever their (biotic or abiotic) origin might be, some morphologies found in actual stromatolite structures (e.g. overhangs) cannot be formed as

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Lambert, M. B. "Stromatolites of the late Archean Back River stratovolcano, Slave structural province, Northwest Territories, Canada." Canadian Journal of Earth Sciences 35, no. 3 (1998): 290–301. http://dx.doi.org/10.1139/e97-115.

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Nine stromatolite localities in the Back River volcanic complex occur at the boundary between 2692 Ma felsic dome-flow complexes, marking the latest eruptions of this stratovolcano, and overlying turbiditic sedimentary rocks of the Beechy Lake Group, Yellowknife Supergroup. Stromatolites form lenses isolated within coarse volcanic breccia at margins of felsic dome-flow complexes, and 2 m thick bioherms that extend laterally for hundreds of metres. Thin units contain wavy laminae and open-spaced, linked mounds, which form thin encrustations on breccia blocks, or clusters of mounds with low syno

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Sharma, Mukund, and Santosh K. Pandey. "Stromatolites of the Kaladgi Basin, Karnataka, India: Systematics, biostratigraphy and age implications." Journal of Palaeosciences 61, no. (1-2) (2012): 103–21. http://dx.doi.org/10.54991/jop.2012.353.

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Systematics of the stromatolites of the Proterozoic Kaladgi Basin is attempted. The main purpose is to document the diversity and distribution of the various stromatolite forms occurring in the Bagalkot Group of the Kaladgi Supergroup. An assemblage of six taxa is recognized from the Bagalkot Group. The forms Asperia digitata (=Yelma digitata), Ephyaltes edingunnensis, Eucapsiphora leakensis, Kussoidella karalundiensis, Pilbaria deverella and Yandilla meekatharrensis are described. These forms are not recorded from any other Proterozoic Sequence of India of the Palaeoproterozoic age. Similar f

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Casal, Gabriel Andrés, Patricia Vallati, Lucio Manuel Ibiricu, et al. "Primer registro de estromatolitos en el Maastrichtiano tardío del Grupo Chubut, Cuenca del Golfo San Jorge, Patagonia central, Argentina." Andean Geology 47, no. 1 (2020): 162. http://dx.doi.org/10.5027/andgeov47n1-3177.

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The presence of stromatolites from Cretaceous outcrops at the headwaters of the río Chico locality in the Golfo San Jorge Basin is reported for the first time. They are present in the uppermost part of the Lago Colhué Huapi Formation (Coniacian-Maastrichtian) of the Chubut Group. The presence of, up to now, four structures interpreted as stromatolites in this locality are not only important because it is the first record in the basin, but because it contributes to the knowledge of these bioconstructions in continental environments. The stromatolite called E1, which is characterized and discuss

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Knoll, Andrew H., Keene Swett, and Elizabeth Burkhardt. "Paleoenvironmental distribution of microfossils and stromatolites in the Upper Proterozoic Backlundtoppen Formation, Spitsbergen." Journal of Paleontology 63, no. 2 (1989): 129–45. http://dx.doi.org/10.1017/s002233600001917x.

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The Upper Proterozoic (ca. 700–800 Ma old) Backlundtoppen Formation, northeastern Spitsbergen, preserves an abundant and varied record of ancient microbial life. Five distinctive microfossil assemblages occur in five equally distinct sedimentary settings; differences among the assemblages appear to reflect original ecological heterogeneity, although taphonomic circumstance may contribute to some distinctions. Microfossil assemblages occur in: oncolites, oolites, and pisolites; stratiform stromatolites and associated intraclastic rudites; partially silicified micrites; and siltites interbedded

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Avdonin, V. V., E. A. Zhegallo, and N. E. Sergeeva. "Bacterial mats of the oxide ores in the world ocean." Proceedings of higher educational establishments. Geology and Exploration, no. 4 (August 28, 2017): 45–49. http://dx.doi.org/10.32454/0016-7762-2017-4-45-49.

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Bacterial mats, formed by successively accumulating biofilms, are the main constructive component of the oxide ferromanganese ores on the oceanic floor. The coordinated behavior of the bacterial colonies in the biofilms controlled the growth of the stromatolites and onkolites structures. Biofilms of the stromatolite bacterial mats represent the microbial community, with the thread bacteria forming a poiygonal network that determines a piliar structure of the crusts. Bacterial mats in nodules are festoon-shaped. Biofilms in festoons intensely interact with the environment, assimilating petrogen

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Nehza, Odette, and George R. Dix. "Stratigraphic restriction of stromatolites in a Middle and Upper Ordovician foreland-platform succession (Ottawa Embayment, eastern Ontario)." Canadian Journal of Earth Sciences 49, no. 10 (2012): 1177–99. http://dx.doi.org/10.1139/e2012-048.

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Stromatolites are abundant and widely distributed within two narrow stratigraphic intervals in Middle (Darriwilian) and Upper (lower Turinian) Ordovician strata of the Laurentian foreland interior in the Ottawa Embayment, eastern Ontario. These lithostratigraphic markers coincide with rapid, tectonically driven flooding of the foreland interior and may identify an opportunistic microbial response to nutrient loading with shallow (peritidal, subtidal) marine reworking of terrestrial or nutrient-rich coastal systems. The remaining (Chatfieldian–Edenian) foreland-platform succession represents de

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Carvalho, Carla, Maria Isabela N. Oliveira, Kita Macario, et al. "Stromatolite Growth in Lagoa Vermelha, Southeastern Coast of Brazil: Evidence of Environmental Changes." Radiocarbon 60, no. 2 (2017): 383–93. http://dx.doi.org/10.1017/rdc.2017.126.

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AbstractAmong the oldest remains of living beings to have inhabited the Earth’s surface, there are the stromatolites—laminated sedimentary rocks associated with lithified mats of layered phototrophic microbial communities—which grow in specific environmental conditions. In the present work, we study a recent carbonatic stromatolite from Lagoa Vermelha (Rio de Janeiro, Brazil), a shallow coastal hypersaline lagoon. X-ray diffraction was associated to a depth chronological model defining three different sections based on changes in mineral composition of the stromatolite with increased dolomite

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Shadrin, A., R. Ivanova, and E. Ponomarenko. "Stromatolites in the Upper Visean sediments of the Pacha-Lasta section (Ilych River, Northern Urals)." Vestnik of geosciences, no. 12 (February 21, 2024): 16–23. http://dx.doi.org/10.19110/geov.2023.12.2.

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The object of the study is the carbonate section «Pacha-Lasta» (Ilych river, Northern Urals). The work is based on the study of the composition, structure of rocks and species diversity of the foraminifera contained in them. The rocks are represented by various limestones with numerous remains of foraminifera, brachiopods, corals, echinoderms, frequent calcispheres and rare stromatolites. Based on the presence in the complex of certain foraminifera genera Biseriella, Globivalvulina, various Eostaffella (including E. ikensis tenebrosa) as well as the species Endothyranopsis sphaerica and Astero

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Petryshyn, Victoria A., Frank A. Corsetti, William M. Berelson, Will Beaumont, and Steve P. Lund. "Stromatolite lamination frequency, Walker Lake, Nevada: Implications for stromatolites as biosignatures." Geology 40, no. 6 (2012): 499–502. http://dx.doi.org/10.1130/g32675.1.

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Patranabis-Deb, Sarbani, and Asru K. Chaudhuri. "Sequence evolution in the eastern Chhattisgarh Basin: constraints on correlation and stratigraphic analysis." Journal of Palaeosciences 57, no. (1-3) (2008): 15–32. http://dx.doi.org/10.54991/jop.2008.225.

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The Proterozoic succession in the eastern part of the Mesoproterozoic Chhattisgarh Basin comprises two unconformity-bounded sequences. Sequence I represents the Chhattisgarh Supergroup of earlier workers. It overlies rocks of the basement complex with a profound unconformity. Sequence II unconformably overlies Sequnce I, and represents the closing phase of basin evolution during the early Neoproterozoic time. It is unconformably overlain by rocks of the Gondwana Supergroup. The Lohardi and Gomarda formations at the lower part of the Chandarpur Group of Sequence I comprise an immature suc

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Dabkowski, J., J. Andrews, P. Antoine, and A. Marca-Bell. "Stable isotope record of Eemian seasonal temperature from MIS 5e tufa stromatolite; Somme Basin, Northern France." Climate of the Past Discussions 9, no. 2 (2013): 1657–74. http://dx.doi.org/10.5194/cpd-9-1657-2013.

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Abstract. In many modern to sub-fossil deposits tufa formations, very well crystallised deposits called stromatolites are preserved. These are often strongly laminated deposits, the laminae linked to seasonal climatic and environmental variations. Where found in fossil tufas such deposits have huge potential as high resolution archives of Pleistocene climate. One of the first investigations of this type has been performed on a 2.5 cm-radius stromatolite from the Eemian sequence of Caours (Somme Basin, Northern France), where precise observations in thin section have been combined with intra-la

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Suosaari, Erica P., R. Pamela Reid, Amanda M. Oehlert, et al. "Stromatolite Provinces of Hamelin Pool: Physiographic Controls On Stromatolites and Associated Lithofacies." Journal of Sedimentary Research 89, no. 3 (2019): 207–26. http://dx.doi.org/10.2110/jsr.2019.8.

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Raaben, M. E. "Dimensional parameters of columnar stromatolites as a result of stromatolite ecosystem evolution." Stratigraphy and Geological Correlation 14, no. 2 (2006): 150–63. http://dx.doi.org/10.1134/s0869593806020031.

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Reyes, Kristina, Nicolas I. Gonzalez, Joshua Stewart, et al. "Surface Orientation Affects the Direction of Cone Growth by Leptolyngbya sp. Strain C1, a Likely Architect of Coniform Structures Octopus Spring (Yellowstone National Park)." Applied and Environmental Microbiology 79, no. 4 (2012): 1302–8. http://dx.doi.org/10.1128/aem.03008-12.

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ABSTRACTLaminated, microbially produced stromatolites within the rock record provide some of the earliest evidence for life on Earth. The chemical, physical, and biological factors that lead to the initiation of these organosedimentary structures and shape their morphology are unclear. Modern coniform structures with morphological features similar to stromatolites are found on the surface of cyanobacterial/microbial mats. They display a vertical element of growth, can have lamination, can be lithified, and observably grow with time. To begin to understand the microbial processes and interactio

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Olea-Olea, Selene, Raúl A. Silva-Aguilera, Javier Alcocer, et al. "Water–Rock Interaction Processes in Groundwater and Flows in a Maar Lake in Central Mexico." Water 16, no. 5 (2024): 715. http://dx.doi.org/10.3390/w16050715.

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Tropical maar lakes are distinct ecosystems with unique ecological features. To comprehend, manage, and conserve these lakes, it is essential to understand their water sources, particularly groundwater, and the hydrogeochemical processes shaping their water chemistry. This research focuses on the maar lake Alchichica in central Mexico, known for harboring 18 new and endemic species and a ring of stromatolites. With groundwater discharge as the primary source, concerns arise over anthropic extraction impacts on water levels and stromatolite survival. Sampling six wells and one piezometer reveal

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Fischer, Sadie, and Philip Fralick. "Biological mats in siliciclastic sediments of the Paleoproterozoic Gunflint Formation, northwestern Ontario, Canada." Canadian Journal of Earth Sciences 57, no. 8 (2020): 947–53. http://dx.doi.org/10.1139/cjes-2019-0120.

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The Gunflint Formation of northwestern Ontario, Canada, contains an extensive array of stromatolite morphologies and associated fossilized bacteria. It, and correlative units in the United States, provided some of the most persuasive early interpretations of stromatolites and evidence of Precambrian bacterial life. This study examined the siliciclastic rocks in the Gunflint Formation and discovered a multitude of features formed by the development of cohesive biogenic mats on bedding surfaces. In former shallow subtidal depositional settings, evidence of mat erosion was most common, with the p

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Kah, Linda C., Julie K. Bartley, Tracy D. Frank, and Timothy W. Lyons. "Reconstructing sea-level change from the internal architecture of stromatolite reefs: an example from the Mesoproterozoic Sulky Formation, Dismal Lakes Group, arctic Canada." Canadian Journal of Earth Sciences 43, no. 6 (2006): 653–69. http://dx.doi.org/10.1139/e06-013.

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The Mesoproterozoic Dismal Lakes Group, arctic Canada, contains a relatively thin, yet regionally extensive stromatolitic reef complex that developed subtidally during a major transgression, shoaled to sea level, and was overlain by intertidal to supratidal carbonate and evaporite strata. The September Lake reef complex exhibits a complex internal architecture that records the interaction between stromatolite growth and changes in accommodation space derived from both higher order (4th- or 5th-order, parasequence-scale) changes in sea level and the variable bathymetry of the sea floor. Reef gr

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Sharma, R. K., B. Balaji, and Savan Singh Chouhan. "A Case Study of Phosphorite Investigation in Jhabua District, Madhya Pradesh, India: By Barefoot Geologist." Journal of Geography, Environment and Earth Science International 27, no. 9 (2023): 122–39. http://dx.doi.org/10.9734/jgeesi/2023/v27i9711.

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The Jhabua phosphorite is the second largest deposit in India after the famous Jhamerkotra deposit of Rajasthan. Though geographically they are separated by state boundaries but geologically they belong to the same domain. The Jhabua deposit is hosted with in the Proterozoic meta-sediments of Aravalli Supergroup. The host litho-units for the stromatolite bearing phosphate mineralization are limestone and chert. The limestone is siliceous in nature and has large variation in terms of impurities and grades to dolomite. The phosphate content is higher in cherts compared to limestone. The stromato

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Joseph, Rhawn G., Olivier Planchon, N. S. Duxbury, et al. "Oceans, Lakes, and Stromatolites on Mars." Advances in Astronomy 2020 (October 17, 2020): 1–15. http://dx.doi.org/10.1155/2020/6959532.

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Billions of years ago, the Northern Hemisphere of Mars may have been covered by at least one ocean and thousands of lakes and rivers. These findings, based initially on telescopic observations and images by the Mariner and Viking missions, led investigators to hypothesize that stromatolite fashioning cyanobacteria may have proliferated in the surface waters, and life may have been successfully transferred between Earth and Mars via tons of debris ejected into the space following bolide impact. Studies conducted by NASA’s robotic rovers also indicate that Mars was wet and habitable and may have

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Wang, Hongpeng, Yingjian Xin, Peipei Fang, et al. "LIBS-MLIF Method: Stromatolite Phosphorite Determination." Chemosensors 11, no. 5 (2023): 301. http://dx.doi.org/10.3390/chemosensors11050301.

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The search for biominerals is one of the core targets in the deep space exploration mission. Stromatolite phosphorite is a typical biomineral that preserves early life on Earth. The enrichment of phosphate is closely related to microorganisms and their secretions. Laser-induced breakdown spectroscopy (LIBS) has become an essential payload in deep space exploration with the ability to analyze chemical elements remotely, rapidly, and in situ. This paper aims to evaluate the rapid identification of biological and non-biological minerals through a remote LIBS payload. LIBS is used for element anal

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Zhang, Yongli, Guanming Lai, Enpu Gong, Dingcheng Yuan, Mark A. Wilson, and Yu Li. "Characteristics of Early Neoproterozoic Stromatolites from Southern Liaoning, North China: Insights into the Formation of Stromatolites." Journal of Marine Science and Engineering 11, no. 9 (2023): 1709. http://dx.doi.org/10.3390/jmse11091709.

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Stromatolites, among the earliest fossils in Earth’s history, are widely distributed on the margins of the North China Precambrian carbonate platform. The formation processes of stromatolites reveal the biomineralization and evolution of early life in the Precambrian. The well-preserved stromatolitic dolostones recorded in the Ganjingzi Formation are developed around Yuanjiagou village, in southern Liaoning Province. The morphology of the Ganjingzi stromatolites manifests in stratiform, columnar, and domal forms. A tripartite lamina structure including light laminae and two types of dark lamin

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Sumina, E. L., and D. L. Sumin. "Adaptive reactions of ancient fossil organisms: Likely evolutionary causes of sociality emergence." Журнал общей биологии 84, no. 2 (2023): 98–113. http://dx.doi.org/10.31857/s0044459623020070.

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The results of the study of stromatolites for the purposes of geology have shown the directed and irreversible nature of their evolution. Further detailed study of the structure made it possible to reveal the subordination of the structures of various hierarchical levels and the consistency of their changes over time, which indicates the presence of morphogenetic and adaptive capabilities in the macroscopic stromatolite-forming agent – the properties of an integral organism. This was in conflict with the ideas existing at that time about the impossibility of the formation of organized communit

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Sharma, Mukund. "Stromatolites studies in India: An overview." Journal of Palaeosciences 57, no. (1-3) (2008): 63–67. http://dx.doi.org/10.54991/jop.2008.228.

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Indian subcontinent with extensive Archaean and Proterozoic sedimentary successions has number of stromatolites occurrences which offers avenues of stromatolites studies. The present paper traces the efforts, strengths and gaps in stromatolites studies in India and summarizes significant Indian contributions made in the past in the country and briefly mentions the global advancements made in this field. The overview covers the period of active research from 1908-2005.

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Wendt, Jobst. "Solenoporacean Stromatolites." PALAIOS 8, no. 1 (1993): 101. http://dx.doi.org/10.2307/3515224.

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Moore, LS. "Water chemistry of the coastal saline lakes of the Clifton-Preston Lakeland system, south-western Australia, and its influence on stromatolite formation." Marine and Freshwater Research 38, no. 5 (1987): 647. http://dx.doi.org/10.1071/mf9870647.

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The water chemistry of Lake Clifton, the adjacent lakes and the regional ground water was investigated to aid in the elucidation of the factors responsible for the restriction of living stromatolites to Lake Clifton. The ionic composition of water in the lakes is proportionally similar to sea water, but the ground water is enriched in calcium and bicarbonate and is of lower salinity (1-2 g I-1). The salinities of the lakes ranged from 7 to 369 g l-1 during 1984 but, in contrast to the other lakes, Clifton remained less saline than sea water throughout the year. Ground waters from an unconfined

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Hillaire-Marcel, Claude, Odette Carro, and Joel Casanova. "14C and Th/U Dating of Pleistocene and Holocene Stromatolites from East African Paleolakes." Quaternary Research 25, no. 3 (1986): 312–239. http://dx.doi.org/10.1016/0033-5894(86)90004-9.

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During recent humid episodes, stromatolites were built along paleolake margins, some 60 m above the modern water level of Lakes Natron and Magadi (southern Gregory Rift Valley). Three generations of stromatolites are observed, the more recent ones frequently covering pebbles and boulders eroded from the older ones. The youngest one yielded 14C ages ranging from approximately 12,000 to 10,000 yr B.P. Their δ13C values (≥2.6%) suggest isotopic equilibrium between the paleolake total inorganic dissolved carbon and the atmospheric CO2, thereby lending credence to the reliability of the 14C. An ini

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