Research in great Australian bight yields exciting early results

Albert C. Hine*, David A. Feary, Mitchell J. Malone, Miriam Andres, Christian Betzler, Gregg R. Brooks, Charlotte A. Brunner, Michael D. Fuller, Ann E. Holbourn, Mads Huuse, Alexandra R. Isern, Noel P. James, Bryan C. Ladner, Qianyu Li, Hideaki Machiyama, David J. Mallinson, Hiroki Matsuda, Richard M. Mitterer, Roberto S. Molina-Garza, Cecile RobinJoellen L. Russell, Samir Shafik, J. A. Simo Toni, Peter L. Smart, Guy H. Spence, Finn Surlyk, Peter K. Swart, Ulrich G. Wortmann

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

Confirmation that Pleistocene mound features underlying the outer shelf and shelf edge are bryozoan buildups—effectively coolwater reefs—was one of several exciting discoveries during recent research earlier this year on the Great Australian Bight. Also found on Ocean Drilling Program (ODP) Leg 182 was startling evidence of high salinity fluid circulation within the shelf substrate, producing extremely high methane and hydrogen sulfide gas levels and accelerated diagenesis.

In addition, an expanded middle Eocene to early Oligocene record of Southern Ocean initiation was recovered by the shipboard scientific party, aboard the JOIDES Resolution. The group also calculated unexpectedly high rates of shelf edge cool-water carbonate accumulation (up to 40 cm/kyr).
Original languageEnglish
Pages (from-to)521-526
Number of pages6
JournalEOS
Volume80
Issue number44
DOIs
Publication statusPublished - 1999

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