Global ETD Search
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Showing 1 to 6 of 6 for “"stromatolite"”.
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Biosynthetic characterisation of secondary metabolites from stromatolite cyanobacteria Symploca sp. 1013
… various marine cyanobacterial isolates from from stromatolites in Shark Bay, Western Australia, were screened for the presence of PKS and NRPS. The presence of both secondary metabolite pathways were seen in the Symploca sp. 1013 as well as 5 stromatolite samples with PKS and/or NRPS genes. …
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Carbonate ramp to deeper shale-shelf transitions of an Upper Cambrian (Dresbachian) shelf embayment, Nolichucky Formation, southwest Virginia
… Peritidal facies are cyclic, upward-shallowing stromatolite sequences. These grade seaward into subtidal thick, cross-bedded ooid and oncolitic intraclast-grainstones that pass into subwave base deeper ramp nodular dolomottled ribbon carbonates and rare thin lenses of conglomerate. Ribbon …
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The paleoecology of the Keyser limestone: a re-evaluation
… to Benthic Assemblage 1 of Boucot (1975), is the Stromatolite Community, followed by the Tentaculites-Meristella-Cupularostrumgordoni Schuchertella and Meristella Communities of Benthic Assemblage 2, the Stromatoporoid-Coral, Crinoid, and Gypidula communities of Benthic Assemblage 3, the Dalejina …
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Stromatolitic Knobs in Storrs Lake, San Salvador, Bahamas: Insights into Organomineralization
… are laminated, and therefore classified as stromatolites. This study focuses on small stromatolitic knobs located in the southern portion of Storrs lake, which are still actively forming, to gain insights into the early stages of stromatolite formation. These knobs appear to be forming as …
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Paragenesis of Lacustrine Microbialites in the Upper Wilkins Peak Member, Green River Formation, Wyoming
… <p>Differences in mineralogy and paragenesis of stromatolite and matrix in units below and above the layered tuff bed indicate different stages of lake and pore water chemical variations. These stages are:</p> <p>1) Microbialite formation in a freshwater lake;</p> <p>2) Dolomitization of …
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The Geobiology of the Paleoproterozoic Belcher Group, Nunavut, Canada
… likely represent cyanobacteria that built stromatolite structures in peritidal carbonate rocks, consistent with previous work. New data from Raman and XPS show that organic carbon is present in the spherules from the Kipalu Formation, which suggests microbiota could have facilitated the …