Precambrian-Cambrian boundary global stratotype ratified and a new perspective of Cambrian time

Abstract

Research Article| February 01, 1994 Precambrian-Cambrian boundary global stratotype ratified and a new perspective of Cambrian time Ed Landing Ed Landing 1New York State Geological Survey, The State Education Department, Albany, New York 12230 Search for other works by this author on: GSW Google Scholar Geology (1994) 22 (2): 179–182. https://doi.org/10.1130/0091-7613(1994)022<0179:PCBGSR>2.3.CO;2 Article history first online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Ed Landing; Precambrian-Cambrian boundary global stratotype ratified and a new perspective of Cambrian time. Geology 1994;; 22 (2): 179–182. doi: https://doi.org/10.1130/0091-7613(1994)022<0179:PCBGSR>2.3.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 The Precambrian-Cambrian boundary global stratotype is the base of the Phycodes pedum Zone at Fortune Head, southeastern Newfoundland. The initial, two-stage radiation of the Phanerozoic fauna (the appearance of Phanerozoic-aspect trace producers and subsequent origin of diverse skeletalized metazoans) was earliest Cambrian. Fossil assemblages with deep, complex burrows or originally mineralized skeletal fossils (with exception of Cloudina) are Early Cambrian or younger. Correlation into Avalon indicates that strata once referred to the Proterozoic (e.g., Manykaian [or Nemakit-Daldynian] and Rovno stages) are lowest Cambrian and that the Siberian Tommotian Stage is middle Lower Cambrian. The thick sequence and complex epeirogenic history of the Placentian Series, as compared with the trilobite-bearing Branchian Series, suggest that most Early Cambrian time is represented by the subtrilobitic Lower Cambrian. 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.