FORAMINIFERA AND THEIR HABITATS WITHIN A COOL-WATER CARBONATE SUCCESSION FOLLOWING GLACIATION, EARLY PERMIAN (SAKMARIAN), WESTERN AUSTRALIA

Abstract

Research Article| October 01, 2004 FORAMINIFERA AND THEIR HABITATS WITHIN A COOL-WATER CARBONATE SUCCESSION FOLLOWING GLACIATION, EARLY PERMIAN (SAKMARIAN), WESTERN AUSTRALIA Matthew Dixon; Matthew Dixon * School of Earth and Geographical Sciences, University of Western Australia, 35 Stirling Highway, Crawley 6009, WA, Australia *E-mails: mdixon@segs.uwa.edu.au; dhaig@segs.uwa.edu.au Search for other works by this author on: GSW Google Scholar David W. Haig David W. Haig * School of Earth and Geographical Sciences, University of Western Australia, 35 Stirling Highway, Crawley 6009, WA, Australia *E-mails: mdixon@segs.uwa.edu.au; dhaig@segs.uwa.edu.au Search for other works by this author on: GSW Google Scholar Author and Article Information Matthew Dixon * School of Earth and Geographical Sciences, University of Western Australia, 35 Stirling Highway, Crawley 6009, WA, Australia David W. Haig * School of Earth and Geographical Sciences, University of Western Australia, 35 Stirling Highway, Crawley 6009, WA, Australia *E-mails: mdixon@segs.uwa.edu.au; dhaig@segs.uwa.edu.au Publisher: Cushman Foundation for Foraminiferal Research Received: 25 Jul 2003 Accepted: 22 Apr 2004 First Online: 03 Mar 2017 Online ISSN: 1943-264X Print ISSN: 0096-1191 © 2004 Journal of Foraminiferal Research Journal of Foraminiferal Research (2004) 34 (4): 308–324. https://doi.org/10.2113/34.4.308 Article history Received: 25 Jul 2003 Accepted: 22 Apr 2004 First Online: 03 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 Matthew Dixon, David W. Haig; FORAMINIFERA AND THEIR HABITATS WITHIN A COOL-WATER CARBONATE SUCCESSION FOLLOWING GLACIATION, EARLY PERMIAN (SAKMARIAN), WESTERN AUSTRALIA. Journal of Foraminiferal Research 2004;; 34 (4): 308–324. doi: https://doi.org/10.2113/34.4.308 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 SocietyJournal of Foraminiferal Research Search Advanced Search Abstract One of the best-developed carbonate successions of the Lower Permian in eastern Gondwana is the Callytharra Formation, deposited above glacially influenced sediments in a narrow elongate rift basin far from the open ocean. This formation and the underlying Carrandibby Formation provide evidence for faunal changes that accompanied the melting of the Sakmarian Gondwanan ice sheets. Diverse smaller benthic foraminifera including organic-cemented agglutinated, hyaline, and porcelaneous calcitic forms, accompany a heterozoan macrofauna (mainly bryozoans, crinoids and brachiopods). Fusulinid foraminifera and calcareous algae are absent. Seven foraminiferal assemblage zones subdivide the succession and parallel changes in associated macrofauna and lithofacies. Environmental changes determined from the succession include (1) a transition from nearshore, low-energy, low-salinity, cool waters to higher-energy, normal-marine waters supporting bryozoan, crinoidal and non-skeletal-macroalgal meadows; and (2) a transition from well-oxygenated, shallow-water, sandy substrates to deeper-water, less-oxygenated, muddy substrates. Faunal comparisons suggest that at paleolatitudes higher than 45°S, in widely separated interior basins in eastern Gondwana, a change from low-diversity, siliceous-agglutinated to high-diversity, Calcitornella-rich, foraminiferal assemblages took place during the Sakmarian. This change may have been associated with a reduction in melt-water influx into the interior basins from retreating Gondwanan ice sheets. The warming was insufficient to allow colonization of the shallow seas by fusulinids and calcareous algae, which only ranged as far south as 45°S paleolatitude. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.