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GEOREF RECORD

Mascarene plateau, western Indian Ocean

Robert L. Fisher, G. Leonard Johnson and Bruce C. Heezen
Mascarene plateau, western Indian Ocean
Geological Society of America Bulletin (1967) 78 (10): 1247-1266

Abstract

The submarine Mascarene plateau, lying east and northeast of Madagascar in the west central Indian Ocean, extends as a faulted composite arc for 2300 km, from the Precambrian granitic 'microcontinent' of Seychelles bank southward through the coral-reef-capped volcanic structures (?) of Saya de Malha, Nazareth, and Cargados Carajos banks to the faulted Tertiary-Quaternary oceanic volcanic island Mauritius. Locally the aseismic plateau is buttressed by spurs, is steep-sided and angular in plan, or is extended, disrupted, or offset by cross-faulting. Other major structural elements in a sector centered on the Mascarene plateau are: (1) the seismically active Mid-Indian Ocean ridge and rift zone (including that portion known as the Carlsberg ridge) between the equator and its bifurcation near 23 degrees S.; (2) the angular and faulted Amirante trench lying between Seychelles bank and the Madagascar-Farquhar complex; (3) the east-west late Tertiary-Pleistocene Rodriguez ridge and its possible extension eastward as a fracture zone offsetting the Mid-Indian Ocean ridge; (4) the Mauritius trench, a 1400-km border deep trending southwest from east of Mauritius to 28 degrees S., 51 degrees E.


ISSN: 0016-7606
EISSN: 1943-2674
Coden: BUGMAF
Serial Title: Geological Society of America Bulletin
Serial Volume: 78
Serial Issue: 10
Title: Mascarene plateau, western Indian Ocean
Pages: 1247-1266
Published: 1967
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
Accession Number: 1968-003343
Categories: Oceanography
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. (incl. map)
S60°00'00" - N25°00'00", E20°00'00" - E147°00'00"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from Bibliography and Index of Geology Exclusive of North America, Geological Society of America, Boulder, CO, United States
Update Code: 1968
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