Exceptionally preserved Late Ordovician biotas from Manitoba, Canada

Abstract

Research Article| October 01, 2007 Exceptionally preserved Late Ordovician biotas from Manitoba, Canada Graham A. Young; Graham A. Young 1The Manitoba Museum, 190 Rupert Avenue, Winnipeg, Manitoba R3B 0N2, Canada Search for other works by this author on: GSW Google Scholar David M. Rudkin; David M. Rudkin 2Department of Natural History, Royal Ontario Museum, 100 Queen's Park, Toronto, Ontario M5S 2C6, Canada Search for other works by this author on: GSW Google Scholar Edward P. Dobrzanski; Edward P. Dobrzanski 3The Manitoba Museum, Winnipeg, Manitoba R3B 0N2, Canada Search for other works by this author on: GSW Google Scholar Sean P. Robson; Sean P. Robson 3The Manitoba Museum, Winnipeg, Manitoba R3B 0N2, Canada Search for other works by this author on: GSW Google Scholar Godfrey S. Nowlan Godfrey S. Nowlan 4Geological Survey of Canada, 3303 33rd Street N.W., Calgary, Alberta T2L 2A7, Canada Search for other works by this author on: GSW Google Scholar Geology (2007) 35 (10): 883–886. https://doi.org/10.1130/G23947A.1 Article history received: 21 Nov 2006 rev-recd: 30 Mar 2007 accepted: 19 Apr 2007 first online: 09 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 Graham A. Young, David M. Rudkin, Edward P. Dobrzanski, Sean P. Robson, Godfrey S. Nowlan; Exceptionally preserved Late Ordovician biotas from Manitoba, Canada. Geology 2007;; 35 (10): 883–886. doi: https://doi.org/10.1130/G23947A.1 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 There are few body fossil biotas known from early Paleozoic accretionary shorelines, and very few examples of Ordovician soft-bodied assemblages. This study documents two recently discovered biotas from separate sedimentary basins in Manitoba, Canada, that provide unique information about tropical shoreline communities shortly before the Late Ordovician extinction event. Each site represents a distinct depositional environment, but they share biotic elements, including eurypterids, xiphosurids, and large problematic tubes. The William Lake biota, representing more restricted conditions, includes jellyfish that are among the best hydromedusan body fossils known. Rocks at the Airport Cove site, deposited under more open circulation, contain scolecodonts and noncalcified algae. These biotas have some parallels with the recently described Middle Ordovician Winneshiek Lagerstätte, but are also similar to some Late Silurian assemblages. Considered together, early Paleozoic marginal marine deposits are a rich but as yet poorly known source of paleobiodiversity data. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.