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Petrology and sedimentology of the Horlick Formation (Lower Devonian), Ohio Range, Transantarctic Mountains

Bulletin 1780

By:
and

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Abstract

The Horlick Formation of Early Devonian age is as thick as 50 m and consists of subhorizontal, interbedded subarkosic sandstone and chloritic shale and mudstone. The Horlick overlies an erosion surface cut into Ordovician granitic rocks and is, in turn, overlain by Carboniferous and Permian glacial and periglacial deposits. Textures, sedimentary structures, and ubiquitous marine body fossils and animal traces suggest that the Horlick was deposited on a shallow shelf having moderate wave energy and a moderate tidal range. The source terrane probably lay to the north, and longshore transport was toward the west.

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Additional publication details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Petrology and sedimentology of the Horlick Formation (Lower Devonian), Ohio Range, Transantarctic Mountains
Series title:
Bulletin
Series number:
1780
Year Published:
1987
Language:
English
Publisher:
U.S. Geological Survey
Description:
iv, 31 p.
Other Geospatial:
Antarctica, Ohio Range