Zobrazeno 1 - 10 of 76 pro vyhledávání: '"Stanley A. Awramik"'
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Akademický článek
Life on a Mesoarchean marine shelf – insights from the world’s oldest known granular iron formation
Autor: Albertus J. B. Smith, Nicolas J. Beukes, Jens Gutzmer, Clark M. Johnson, Andrew D. Czaja, Noah Nhleko, Frikkie de Beer, Jakobus W. Hoffman, Stanley M. Awramik
Publikováno v: Scientific Reports, Vol 10, Iss 1, Pp 1-8 (2020)
Abstract The Nconga Formation of the Mesoarchean (~2.96–2.84 Ga) Mozaan Group of the Pongola Supergroup of southern Africa contains the world’s oldest known granular iron formation. Three dimensional reconstructions of the granules using micro-fo
Externí odkaz: https://doaj.org/article/a867a67a8d1d4168ac170697ece89de5
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2
Stromatolite photomorphogenesis: lighting up their shape
Autor: Gregory W. Ojakangas, Stanley M. Awramik, Michael C. Storrie-Lombardi
Publikováno v: International Journal of Astrobiology. 22:33-56
Most stromatolites are built by photosynthetic organisms, for which sunlight is a driving factor. We examine stromatolite morphogenesis with modelling that incorporates the growth rate of cyanobacteria (the dominant stromatolite-builder today, and pr
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6b6d1a1e7bc44b08a5118ecfab96e72f
https://doi.org/10.1017/s1473550422000313
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3
Evidence for benthic oxygen production in Neoarchean lacustrine stromatolites
Autor: Dylan T. Wilmeth, Stefan V. Lalonde, William M. Berelson, Victoria Petryshyn, Aaron J. Celestian, Nicolas J. Beukes, Stanley M. Awramik, John R. Spear, Taleen Mahseredjian, Frank A. Corsetti
Publikováno v: Geology (0091-7613) (Geological Society of America), 2022-08, Vol. 50, N. 8, P. 907-911
The evolution of oxygenic photosynthesis fundamentally altered the global environment, but the history of this metabolism prior to the Great Oxidation Event (GOE) at ca. 2.4 Ga remains unclear. Increasing evidence suggests that non-marine microbial m
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1c12494bf4df04d7d21cf2dcb487e518
https://archimer.ifremer.fr/doc/00770/88243/
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4
Akademický článek
Living Dendrolitic Microbial Mats in Hamelin Pool, Shark Bay, Western Australia
Autor: Erica P. Suosaari, Stanley M. Awramik, R. Pamela Reid, John F. Stolz, Kathleen Grey
Publikováno v: Geosciences, Vol 8, Iss 6, p 212 (2018)
Hamelin Pool, Shark Bay, Western Australia, is home to the largest and most diverse assemblage of living marine stromatolites, with shapes and sizes comparable to ancient structures. A recent field-intensive program revealed seasonally ephemeral occu
Externí odkaz: https://doaj.org/article/1e44a78c53824b0b801c68557b88d418
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5
Deciphering Biosignatures in Planetary Contexts
Autor: Penelope L. King, D. M. Bower, Henderson James Cleaves, Mónica Sánchez-Román, David J. Des Marais, Richard Leveille, Gordon Southam, John R. Spear, Nancy W. Hinman, Marjorie A. Chan, K. R. Rempfert, Penelope J. Boston, Sally L. Potter-McIntyre, Robert M. Hazen, Jack D. Farmer, Dominic Papineau, Tony Z. Jia, Richard J. Gillams, Keith E. Schubert, Stanley M. Awramik, Jennifer C. Stern
Publikováno v: Astrobiology, 19(9), 1075-1102. Mary Ann Liebert Inc.
Chan, M A, Hinman, N W, Potter-Mcintyre, S L, Schubert, K E, Gillams, R J, Awramik, S M, Boston, P J, Bower, D M, Des Marais, D J, Farmer, J D, Jia, T Z, King, P L, Hazen, R M, Léveillé, R J, Papineau, D, Rempfert, K R, Sánchez-Román, M, Spear, J R, Southam, G, Stern, J C & Cleaves, H J 2019, ' Deciphering Biosignatures in Planetary Contexts ', Astrobiology, vol. 19, no. 9, pp. 1075-1102 . https://doi.org/10.1089/ast.2018.1903
Astrobiology
Microbial life permeates Earth's critical zone and has likely inhabited nearly all our planet's surface and near subsurface since before the beginning of the sedimentary rock record. Given the vast time that Earth has been teeming with life, do astro
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6507b20ade710167c64808d34cd458df
http://t2r2.star.titech.ac.jp/cgi-bin/publicationinfo.cgi?q_publication_content_number=CTT100847258
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6
Neoarchean (2.7 Ga) lacustrine stromatolite deposits in the Hartbeesfontein Basin, Ventersdorp Supergroup, South Africa: Implications for oxygen oases
Autor: Dylan T. Wilmeth, Aaron J. Celestian, N.J. Beukes, John R. Spear, Victoria A. Petryshyn, Stanley M. Awramik, Frank A. Corsetti
Publikováno v: Precambrian Research. 320:291-302
The Hartbeesfontein Basin contains the most extensive deposits of Archean lacustrine stromatolites on the Kaapvaal Craton, with stromatolitic facies occurring over ∼100 km 2 in beds up to 7 m thick. Stromatolitic dolostones and cherts both preserve
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d7e63b9fa761154e272c4851c030b260
https://doi.org/10.1016/j.precamres.2018.11.009
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9
Silicified microbiota from the Paleoproterozoic Dahongyu Formation, Tianjin, China
Autor: Stanley M. Awramik, Min Shi, Maliha Zareen Khan, Qinglai Feng, Shixing Zhu
Publikováno v: Journal of Paleontology. 91:369-392
Cherts and silicified dolostones of the ca. 1600 Ma Dahongyu Formation (uppermost Changcheng Group) from North China contain well-preserved microfossils. Cyanobacteria filaments and coccoids dominate the studied Dahongyu microbiota in the Jixian sect
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d2f737a45f2bb1f158bc59f96836a5c8
https://doi.org/10.1017/jpa.2016.163
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