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La Desirade Island (Lesser Antilles) revisited; Lower Cretaceous radiolarian cherts and arguments against an ophiolitic origin for the basal complex
Philippe Bouysse, Reinhard Schmidt-Effing and Denis Westercamp
La Desirade Island (Lesser Antilles) revisited; Lower Cretaceous radiolarian cherts and arguments against an ophiolitic origin for the basal complex
Geology (Boulder) (April 1983) 11 (4): 244-247
La Desirade Island (Lesser Antilles) revisited; Lower Cretaceous radiolarian cherts and arguments against an ophiolitic origin for the basal complex
Geology (Boulder) (April 1983) 11 (4): 244-247
Index Terms/Descriptors
- Antilles
- Barremian
- basement
- biostratigraphy
- Caribbean Plate
- Caribbean region
- chemically precipitated rocks
- chert
- Cretaceous
- diorites
- Guadeloupe
- Hauterivian
- igneous rocks
- Invertebrata
- island arcs
- Jurassic
- Lesser Antilles
- Lower Cretaceous
- Mesozoic
- microfossils
- ophiolite
- plate tectonics
- plutonic rocks
- Protista
- Radiolaria
- sedimentary rocks
- stratigraphy
- tectonophysics
- trondhjemite
- West Indies
- La Desirade
Latitude & Longitude
Abstract
The volcanic basement of La Desirade can be subdivided into three independent units. The cherts interbedded in the unit 2 basalts contain Hauterivian-Barremian radiolarians that represent the oldest biostratigraphic assemblage found in the Lesser Antilles. This affirms the Jurassic radiometric age of the unit 1 trondhjemite outcrop. Basement generated by island-arc processes during the Mesozoic.--Modified journal abstract.
ISSN: 0091-7613
EISSN: 1943-2682
Coden: GLGYBA
Serial Title: Geology (Boulder)
Serial Volume: 11
Serial Issue: 4
Title: La Desirade Island (Lesser Antilles) revisited; Lower Cretaceous radiolarian cherts and arguments against an ophiolitic origin for the basal complex
Affiliation: BRGM, Serv. Geol. Nat.,
Orleans,
France
Pages: 244-247
Published: 198304
Text Language: English
Publisher: Geological Society of America (GSA),
Boulder, CO,
United States
References: 33
Accession Number: 1983-041932
Categories: Stratigraphy
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. block diag., geol. sketch map
N16°00'00" - N17°00'00", W61°30'00" - W61°00'00"
Secondary Affiliation: Philipps-Univ.,
DEU,
Federal Republic of Germany
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2018, American Geosciences Institute.
Update Code: 1983
