Microbiota from the Late Proterozoic Tindir Group, Alaska

Research Article| October 01, 1973 Microbiota from the Late Proterozoic Tindir Group, Alaska Carol W. Allison; Carol W. Allison 1Museum and Geophysical Institute, University of California, Santa Barbara, Santa Barbara, California 93106 Search for other works by this author on: GSW Google Scholar Mary A. Moorman Mary A. Moorman 2Department of Geological Sciences, University of Alaska, College, Alaska 99701 Search for other works by this author on: GSW Google Scholar Geology (1973) 1 (2): 65–68. https://doi.org/10.1130/0091-7613(1973)1<65:MFTLPT>2.0.CO;2 Article history first online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation Carol W. Allison, Mary A. Moorman; Microbiota from the Late Proterozoic Tindir Group, Alaska. Geology 1973;; 1 (2): 65–68. doi: https://doi.org/10.1130/0091-7613(1973)1<65:MFTLPT>2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract Preliminary investigation of carbonaceous sediments from the late Proterozoic Tindir Group, east-central Alaska, reveals the presence of abundant single-celled and spherical colonial nannofossils interpreted to represent blue-green algae. Similar micro-organisms, particularly Sphaerocongregus Moorman, have been reported from the late Proterozoic Hector Formation of southwestern Alberta, Canada. The fossils reported here come from beds tentatively considered to represent the upper Tindir Dolomitic Sandstone and Shale member, stratigraphically above the Basalt and Red Beds member, for which an age of no more than 850 m.y. has been suggested. However, it is possible that the fossiliferous sequence is correlative with the lower Tindir Dolomite and Shale member which immediately underlies the Basalt and Red Beds member, and which contains a stromatolitic structure known in beds 950 m.y. old and older elsewhere. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.