Eocene-miocene shallow-water carbonate platforms and increased habitat diversity in Sarawak, Malaysia

Mihaljevic, Morana, Renema, Willem, Welsh, Kevin and Pandolfi, John M. (2014) Eocene-miocene shallow-water carbonate platforms and increased habitat diversity in Sarawak, Malaysia. Palaios, 29 7: 378-391. doi:10.2110/palo.2013.129


Author Mihaljevic, Morana
Renema, Willem
Welsh, Kevin
Pandolfi, John M.
Title Eocene-miocene shallow-water carbonate platforms and increased habitat diversity in Sarawak, Malaysia
Journal name Palaios   Check publisher's open access policy
ISSN 0883-1351
1938-5323
Publication date 2014-07
Year available 2014
Sub-type Article (original research)
DOI 10.2110/palo.2013.129
Open Access Status Not Open Access
Volume 29
Issue 7
Start page 378
End page 391
Total pages 13
Place of publication Tulsa, OK United States
Publisher Society for Sedimentary Geology (S E P M)
Collection year 2015
Language eng
Abstract The Indo-Pacific marine biodiversity hotspot originated between the late Eocene and the early Miocene. Its origin coincides with an increase in availability of shallow-marine habitats driven by the opening of the South China Sea and the collision of Australia with the Pacific arcs and the southeast Asian margin. However, little is known about the distribution and diversity of past Indo-Pacific marine habitats. Understanding habitat diversity is key for understanding the significance of biodiversity origins and a necessary prerequisite for interpreting biodiversity patterns through time. Here we describe and interpret past carbonate platform environments in Sarawak, Malaysia during a time of active tectonism. We examine upper Eocene to lower Miocene marine shallow-water carbonate deposits from six localities in two limestone formations: the large ramplike Melinau carbonate platform (middle Eocene to early Miocene) and the unattached Subis carbonate platform (early Miocene). Deposits examined in this study represent paleoenvironments. Our analysis reveals an increase in habitat diversity from the Eocene to the Miocene. Mesophotic to oligophotic low-energy environments are typical for the Eocene sites. The corals first appear in the Oligocene deposits, but genuine reef depositional settings are not observed until the Miocene. This study provides both insight into the evolution of the carbonate platform environments along the Sarawak margin, and context for the origin of the Indo-Pacific marine biodiversity hotspot.
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Earth Sciences Publications
Official 2015 Collection
School of Biological Sciences Publications
 
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