Triassic-Lower Jurassic Foraminiferal Indices for Bahaman-Type Carbonate-Bank Limestones, Cablac Mountain, East Timor

Research Article| July 01, 2007 TRIASSIC-LOWER JURASSIC FORAMINIFERAL INDICES FOR BAHAMAN-TYPE CARBONATE-BANK LIMESTONES, CABLAC MOUNTAIN, EAST TIMOR David W. Haig; David W. Haig * School of Earth and Geographical Sciences (M004), The University of Western Australia, 35 Stirling Highway, Crawley 6009, Western Australia, Australia *Correspondence author. E-mail: david.haig@uwa.edu.au Search for other works by this author on: GSW Google Scholar Eujay McCartain; Eujay McCartain School of Earth and Geographical Sciences (M004), The University of Western Australia, 35 Stirling Highway, Crawley 6009, Western Australia, Australia Search for other works by this author on: GSW Google Scholar Logan Barber; Logan Barber School of Earth and Geographical Sciences (M004), The University of Western Australia, 35 Stirling Highway, Crawley 6009, Western Australia, Australia Search for other works by this author on: GSW Google Scholar John Backhouse John Backhouse School of Earth and Geographical Sciences (M004), The University of Western Australia, 35 Stirling Highway, Crawley 6009, Western Australia, Australia Search for other works by this author on: GSW Google Scholar Author and Article Information David W. Haig * School of Earth and Geographical Sciences (M004), The University of Western Australia, 35 Stirling Highway, Crawley 6009, Western Australia, Australia Eujay McCartain School of Earth and Geographical Sciences (M004), The University of Western Australia, 35 Stirling Highway, Crawley 6009, Western Australia, Australia Logan Barber School of Earth and Geographical Sciences (M004), The University of Western Australia, 35 Stirling Highway, Crawley 6009, Western Australia, Australia John Backhouse School of Earth and Geographical Sciences (M004), The University of Western Australia, 35 Stirling Highway, Crawley 6009, Western Australia, Australia *Correspondence author. E-mail: david.haig@uwa.edu.au Publisher: Cushman Foundation for Foraminiferal Research First Online: 03 Mar 2017 Online ISSN: 1943-264X Print ISSN: 0096-1191 © 2007 Journal of Foraminiferal Research Journal of Foraminiferal Research (2007) 37 (3): 248–264. https://doi.org/10.2113/gsjfr.37.3.248 Article history First Online: 03 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation David W. Haig, Eujay McCartain, Logan Barber, John Backhouse; TRIASSIC-LOWER JURASSIC FORAMINIFERAL INDICES FOR BAHAMAN-TYPE CARBONATE-BANK LIMESTONES, CABLAC MOUNTAIN, EAST TIMOR. Journal of Foraminiferal Research 2007;; 37 (3): 248–264. doi: https://doi.org/10.2113/gsjfr.37.3.248 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 Peloidal and oolitic limestones on Cablac Mountain in East Timor contain small calcite-cemented agglutinated and porcelaneous foraminifera that place these limestones in the Triassic or Lower Jurassic, in contrast to the Lower Miocene as previously mapped. An Early Jurassic (Sinemurian-Pliensbachian) age is indicated for some of the limestone by the presence of Meandrovoluta asiagoensis Fugagnoli and Rettori, Everticyclammina praevirguliana Fugagnoli and a palynomorph assemblage. The age of other limestones on the mountain is identified broadly as Late Triassic to Early Jurassic, based on the occurrence of Duotaxis metula Kristan. In basinal facies of the nearby Wai Luli Valley, Gsollbergella spiroloculiformis (Oraveczné Scheffer), palynomorphs, a brachiopod and halobiid bivalves indicate a Late Triassic (Carnian) age for a transported foraminiferal assemblage associated with peloids, ooids and Duotaxis and Siphovalvulina characteristic of carbonate-bank deposits. This occurrence suggests that carbonate banks were developed locally on submerged topographic highs in seas that flooded interior-rift basins in this part of Gondwana and that a complex facies array of deep-water muds, deltaic sands, and carbonate shoals were present in the basins. Taxonomic assessment of Triassic and Early Jurassic species previously placed in Tetrataxis suggests that these are better accommodated in Duotaxis, and some species placed in Trochammina are transferred to Siphovalvulina. The distinction between Duotaxis and Siphovalvulina, as now understood, rests on the shape of adult chambers. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.