Skip to Main Content
Skip Nav Destination
GEOREF RECORD

Giant slide deposits from a Mesozoic fore-arc basin, Alexander Island, Antarctica

David I. M. Macdonald, Andrew C. M. Moncrieff and Peter J. Butterworth
Giant slide deposits from a Mesozoic fore-arc basin, Alexander Island, Antarctica
Geology (Boulder) (November 1993) 21 (11): 1047-1050

Abstract

Several very large synsedimentary slide units exist in the well-exposed Mesozoic fore-arc sequence of Alexander Island, Antarctica. The largest single exposure, which is at least 440 m thick and more than 21 by 6 km in area, forms part of a unit that has a volume of as much as 300 km (super 3) . These units are as large as slide deposits noted by remote sensing on modern continental margins. The apparent absence of large, ancient slide deposits is therefore purely a function of exposure. The enormous size of these Antarctic examples, in which sheets of partially lithified sediment, up to 1 km long, have been transported with little or no internal deformation or tilting, emphasizes the care needed in determining that even very large outcrops are not allochthonous. November 1993


ISSN: 0091-7613
EISSN: 1943-2682
Coden: GLGYBA
Serial Title: Geology (Boulder)
Serial Volume: 21
Serial Issue: 11
Title: Giant slide deposits from a Mesozoic fore-arc basin, Alexander Island, Antarctica
Affiliation: British Antarctic Survey, National Environment Research Council, Cambridge, United Kingdom
Pages: 1047-1050
Published: 199311
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 16
Accession Number: 1993-039109
Categories: Sedimentary petrology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. strat. col., sect., sketch map
S71°30'00" - S69°40'00", W69°00'00" - W68°00'00"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute.
Update Code: 1993
Close Modal

or Create an Account

Close Modal
Close Modal