Permian age from radiolarites of the Hawasina nappes, Oman Mountains

Journal Article · Sat Oct 01 00:00:00 EDT 1988 · Geology; (USA)

DOI:https://doi.org/10.1130/0091-7613(1988)016<0912:PAFROT>2.3.CO;2· OSTI ID:7104181

Wever, P D ^[1]; Grissac, C B ^[2]; Bechennec, F ^[3]

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1. Universite Pierre et Marie Curie (France)
2. Bureau de Recherche Geologique et Miniere, Orleans, (France)
3. Bureau de recherche Geologique et Miniere, Nantes (France)

The Hawasina napper of the Oman Mountains yielded Permian radiolarians from cherts stratigraphically overlying a thick volcanic basement (Al Jil Formation) at the base of the Hamrat Duru Group. This fauna represents the first Permian radiolarians and radiolarites in the central and western Tethyan realm. A Permain age for pelagic sequences within the Hawasina Complex of Oman has major significance for regional paleogeographic reconstruction. A clear differentiation between platform (reefal sediments) and basin (radiolarites) from the base of the Late Permian (255 Ma) is implied. It suggests a flexure of the platform during Permian time; the present data implies that a zone of rifting was already developed adjacent to the northeast Gondwana platform margin during the Late Permian. The Hamrat Duru Basin corresponds to an opening intracontinental rift area (sphenochasm) between Arabia and northeast Gondwana, a reentrant of the paleo-Tethys.

• OSTI ID: 7104181
• Journal Information: Geology; (USA), Vol. 16:10; ISSN 0091-7613
• Country of Publication: United States
• Language: English

Related Subjects

58 GEOSCIENCES
MOUNTAINS
AGE ESTIMATION
OMAN
CHERT
FOSSILS
GEOLOGIC HISTORY
PERMIAN PERIOD
RIFT ZONES
SEDIMENTARY BASINS
STRATIGRAPHY
ASIA
DEVELOPING COUNTRIES
GEOLOGIC AGES
GEOLOGIC STRUCTURES
GEOLOGY
MIDDLE EAST
PALEOZOIC ERA
ROCKS
SEDIMENTARY ROCKS
580000* - Geosciences