Middle and Late Cretaceous history of the Indian Ocean

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doi: 10.1029/GM070p0225
Author(s): Holmes, Mary Anne; Watkins, David K.
Author Affiliation(s): Primary:
University of Nebraska, Department of Geology, Lincoln, NE, United States
University of Michigan, United States
University of Wales College of Cardiff, United Kingdom
Bundesanstalt für Geowissenschaften und Rohstoffe, Federal Republic of Germany
Lamont-Doherty Geological Observatory of Columbia University, United States
Volume Title: Synthesis of results from scientific drilling in the Indian Ocean
Volume Author(s): Duncan, Robert A., editor; Rea, David K.; Kidd, Robert B.; von Rad, Ulrich; Weissel, Jeffrey K.
Source: Synthesis of results from scientific drilling in the Indian Ocean, edited by Robert A. Duncan, David K. Rea, Robert B. Kidd, Ulrich von Rad and Jeffrey K. Weissel. Geophysical Monograph, Vol.70, p.225-244. Publisher: American Geophysical Union, Washington, DC, United States. ISSN: 0065-8448. ISBN: 978-1-118-66803-0 CODEN: GPMGAD
Note: In English. 80 refs.; illus., incl. strat. cols., sects., sketch map
Summary: The east Indian Ocean opened during the Early Cretaceous when India separated from Australo-Antarctica to form the Wharton Basin where hotspot activity formed the Naturaliste Plateau and Kerguelen Plateau-Broken Ridge (KPBR). KPBR was a volcanic archipelago forested by a mild and wet climate-loving climax forest of podocarpaceaen conifers with an understory of tree and seed ferns. Elevated kaolinite at several sites and gibbsite on Kerguelen Plateau further indicate an Albian warming. The warm climate persisted through the Cenomanian as reefs formed on the southeast margin of India, but began to decline during the Turonian as kaolinite disappeared from southern sites. The Wharton Basin had sunk to sub-CCD abyssal depths by this time. The western KPBR formed a shallow shelf in a poorly circulated region where thick greensands accumulated over the slowly subsiding Kerguelen Plateau. In the Paleocene, circulation over KPBR improved and a diverse bryozoan-dominated benthonic fauna and flora developed on KPBR. The mid-Campanian is marked by a nearly ocean-wide disconformity which corresponds to the development of marked provinciality of the calcareous plankton. (Auth. mod.)
Year of Publication: 1992
Research Program: DSDP Deep Sea Drilling Project
ODP Ocean Drilling Program
Key Words: 06 Petrology, Sedimentary; 18 Geophysics, Solid-Earth; Argo abyssal plain; Asia; Australasia; Australia; Broken Ridge; Carnarvon Basin; Cauvery Basin; Continental shelf; Cretaceous; Deep Sea Drilling Project; Depositional environment; Hot spots; India; Indian Ocean; Indian Peninsula; Kerguelen Plateau; Leg 119; Leg 120; Leg 121; Leg 122; Leg 123; Leg 26; Leg 27; Mesozoic; Mozambique Basin; Naturaliste Plateau; Ocean Drilling Program; Perth Basin; Plate tectonics; Rifting; Sedimentation; Somali Basin; Volcanism; Western Australia; Wharton Basin
Coordinates: S684114 S492407 E0855147 E0713936
S584302 S544838 E0811426 E0762427
S310148 N052304 E0933525 E0873548
S203512 S163357 E1153337 E1121231
S195557 S155831 E1173430 E1102714
S300000 S100000 E1240000 E1100000
Record ID: 2007093163
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