Microfossils and Precambrian Iron-Formations

Research Article| March 01, 1967 Microfossils and Precambrian Iron-Formations GENE L LaBERGE GENE L LaBERGE Dept. Geology, Wisconsin State University, Oshkosh, Wisconsin Search for other works by this author on: GSW Google Scholar GSA Bulletin (1967) 78 (3): 331–342. https://doi.org/10.1130/0016-7606(1967)78[331:MAPI]2.0.CO;2 Article history received: 08 Mar 1966 first online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation GENE L LaBERGE; Microfossils and Precambrian Iron-Formations. GSA Bulletin 1967;; 78 (3): 331–342. doi: https://doi.org/10.1130/0016-7606(1967)78[331:MAPI]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 SocietyGSA Bulletin Search Advanced Search Abstract Petrographic studies reveal that structures of possible organic origin and those believed to be relict microfossils are extremely abundant in many Precambrian iron-formations in the United States, Canada, Australia, and South Africa. The structures are mainly spheroids and ellipsoids that range from about 5–40μ in diameter. Particular forms, however, usually have a narrower size range. Some of the structures appear to be similar to certain forms reported by Barghoorn and Tyler (1965) from the Gunflint chert; others presumably are new forms not previously reported.Particular types of structures are present in widely separated districts, indicating a wide geographic distribution. Certain distinctive forms occur in several Proterozoic iron-formations in North America and in an Archean iron-formation in Australia. Other forms occur in iron-formations from the Mesabi Range, Minnesota, and Belcher Islands and Lake Albanel, Canada. 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.