Quaternary bryozoan reef mounds in cool-water, upper slope environments: Great Australian Bight

Research Article| July 01, 2000 Quaternary bryozoan reef mounds in cool-water, upper slope environments: Great Australian Bight Noel P. James; Noel P. James 1Queen's University, Kingston, Ontario K7L 3N6, Canada Search for other works by this author on: GSW Google Scholar Ocean Drilling Program Leg 182 Scientific Party; Ocean Drilling Program Leg 182 Scientific Party Search for other works by this author on: GSW Google Scholar David A. Feary; David A. Feary 2Australian Geological Survey Organization, Canberra ACT 2601, Australia Search for other works by this author on: GSW Google Scholar Ocean Drilling Program Leg 182 Scientific Party; Ocean Drilling Program Leg 182 Scientific Party Search for other works by this author on: GSW Google Scholar Finn Surlyk; Finn Surlyk 3University of Copenhagen, 1350 Copenhagen, Denmark Search for other works by this author on: GSW Google Scholar Ocean Drilling Program Leg 182 Scientific Party; Ocean Drilling Program Leg 182 Scientific Party Search for other works by this author on: GSW Google Scholar J.A. Toni Simo; J.A. Toni Simo 4University of Wisconsin, Madison, Wisconsin 53706, USA Search for other works by this author on: GSW Google Scholar Ocean Drilling Program Leg 182 Scientific Party; Ocean Drilling Program Leg 182 Scientific Party Search for other works by this author on: GSW Google Scholar Christian Betzler; Christian Betzler 5Johann Wolfgang Goethe-Universität, Frankfurt-am-Main 60054, Germany Search for other works by this author on: GSW Google Scholar Ocean Drilling Program Leg 182 Scientific Party; Ocean Drilling Program Leg 182 Scientific Party Search for other works by this author on: GSW Google Scholar Ann E. Holbourn; Ann E. Holbourn 6Kiel University, Kiel D-24118, Germany Search for other works by this author on: GSW Google Scholar Ocean Drilling Program Leg 182 Scientific Party; Ocean Drilling Program Leg 182 Scientific Party Search for other works by this author on: GSW Google Scholar Qianyu Li; Qianyu Li 7University of Adelaide, Adelaide, South Australia 5005, Australia Search for other works by this author on: GSW Google Scholar Ocean Drilling Program Leg 182 Scientific Party; Ocean Drilling Program Leg 182 Scientific Party Search for other works by this author on: GSW Google Scholar Hiroki Matsuda; Hiroki Matsuda 8Kumamoto University, Kumamoto 860, Japan Search for other works by this author on: GSW Google Scholar Ocean Drilling Program Leg 182 Scientific Party; Ocean Drilling Program Leg 182 Scientific Party Search for other works by this author on: GSW Google Scholar Hideaki Machiyama; Hideaki Machiyama 9Japan Marine Science and Technology Center, Kanagawa 237-0061, Japan Search for other works by this author on: GSW Google Scholar Ocean Drilling Program Leg 182 Scientific Party; Ocean Drilling Program Leg 182 Scientific Party Search for other works by this author on: GSW Google Scholar Gregg R. Brooks; Gregg R. Brooks 10Eckerd College, St. Petersburg, Florida 33711, USA Search for other works by this author on: GSW Google Scholar Ocean Drilling Program Leg 182 Scientific Party; Ocean Drilling Program Leg 182 Scientific Party Search for other works by this author on: GSW Google Scholar Miriam S. Andres; Miriam S. Andres 11ETH-Zentrum, 8092 Zurich, Switzerland Search for other works by this author on: GSW Google Scholar Ocean Drilling Program Leg 182 Scientific Party; Ocean Drilling Program Leg 182 Scientific Party Search for other works by this author on: GSW Google Scholar Albert C. Hine; Albert C. Hine 12University of South Florida, St. Petersburg, Florida 33701, USA Search for other works by this author on: GSW Google Scholar Ocean Drilling Program Leg 182 Scientific Party; Ocean Drilling Program Leg 182 Scientific Party Search for other works by this author on: GSW Google Scholar Mitchell J. Malone; Mitchell J. Malone 13Ocean Drilling Program, Texas A&M University, College Station, Texas 77845, USA Search for other works by this author on: GSW Google Scholar Ocean Drilling Program Leg 182 Scientific Party Ocean Drilling Program Leg 182 Scientific Party Search for other works by this author on: GSW Google Scholar Author and Article Information Noel P. James 1Queen's University, Kingston, Ontario K7L 3N6, Canada Ocean Drilling Program Leg 182 Scientific Party David A. Feary 2Australian Geological Survey Organization, Canberra ACT 2601, Australia Ocean Drilling Program Leg 182 Scientific Party Finn Surlyk 3University of Copenhagen, 1350 Copenhagen, Denmark Ocean Drilling Program Leg 182 Scientific Party J.A. Toni Simo 4University of Wisconsin, Madison, Wisconsin 53706, USA Ocean Drilling Program Leg 182 Scientific Party Christian Betzler 5Johann Wolfgang Goethe-Universität, Frankfurt-am-Main 60054, Germany Ocean Drilling Program Leg 182 Scientific Party Ann E. Holbourn 6Kiel University, Kiel D-24118, Germany Ocean Drilling Program Leg 182 Scientific Party Qianyu Li 7University of Adelaide, Adelaide, South Australia 5005, Australia Ocean Drilling Program Leg 182 Scientific Party Hiroki Matsuda 8Kumamoto University, Kumamoto 860, Japan Ocean Drilling Program Leg 182 Scientific Party Hideaki Machiyama 9Japan Marine Science and Technology Center, Kanagawa 237-0061, Japan Ocean Drilling Program Leg 182 Scientific Party Gregg R. Brooks 10Eckerd College, St. Petersburg, Florida 33711, USA Ocean Drilling Program Leg 182 Scientific Party Miriam S. Andres 11ETH-Zentrum, 8092 Zurich, Switzerland Ocean Drilling Program Leg 182 Scientific Party Albert C. Hine 12University of South Florida, St. Petersburg, Florida 33701, USA Ocean Drilling Program Leg 182 Scientific Party Mitchell J. Malone 13Ocean Drilling Program, Texas A&M University, College Station, Texas 77845, USA Ocean Drilling Program Leg 182 Scientific Party Publisher: Geological Society of America Received: 13 Dec 1999 Revision Received: 29 Mar 2000 Accepted: 09 Apr 2000 First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (2000) 28 (7): 647–650. https://doi.org/10.1130/0091-7613(2000)28<647:QBRMIC>2.0.CO;2 Article history Received: 13 Dec 1999 Revision Received: 29 Mar 2000 Accepted: 09 Apr 2000 First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Noel P. James, David A. Feary, Finn Surlyk, J.A. Toni Simo, Christian Betzler, Ann E. Holbourn, Qianyu Li, Hiroki Matsuda, Hideaki Machiyama, Gregg R. Brooks, Miriam S. Andres, Albert C. Hine, Mitchell J. Malone; Ocean Drilling Program Leg 182 Scientific Party, Quaternary bryozoan reef mounds in cool-water, upper slope environments: Great Australian Bight. Geology 2000;; 28 (7): 647–650. doi: https://doi.org/10.1130/0091-7613(2000)28<647:QBRMIC>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 SocietyGeology Search Advanced Search Abstract Bryozoan reef mounds are common features in the geological record, occurring within mid-ramp, slope paleoenvironments, especially in Paleozoic carbonate successions, but until now have not been recorded from the modern ocean. Recent scientific drilling in the Great Australian Bight (Ocean Drilling Program Leg 182) has confirmed the existence of shallow subsurface bryozoan reef mounds in modern water depths of 200–350 m. These structures have as much as 65 m of synoptic relief, and occur both as single mounds and as mound complexes. They are unlithified, have a floatstone texture, and are rich in delicate branching, encrusting and/or nodular-arborescent, flat-robust branching, fenestrate, and articulated zooidal bryozoan growth forms. The muddy matrix is composed of foraminifers, serpulids, fecal pellets, irregular bioclasts, sponge spicules, and calcareous nannofossils. The 14C accelerator mass spectrometry dates of 26.6–35.1 ka indicate that the most recent mounds, the tops of which are 7–10 m below the modern seafloor, flourished during the last glacial lowstand but perished during transgressive sea-level rise. This history reflects changing oceanographic current patterns; strong upwelling during lowstands, and reduced upwelling and lowered trophic resources during highstands. Large specimens of benthic foraminifers restricted to the mounds confirm overall mesotrophic growth conditions. The mounds are similar in geometry, scale, general composition, and paleoenvironments to older structures, but lack obvious microbial influence and extensive synsedimentary cementation. Such differences reflect either short-term local conditions or long-term temporal changes in ocean chemistry and biology. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.

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