Giant slide deposits from a Mesozoic fore-arc basin, Alexander Island, Antarctica
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 km3. These units a...
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1993
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ftnerc:oai:nora.nerc.ac.uk:517885 2023-05-15T13:15:15+02:00 Giant slide deposits from a Mesozoic fore-arc basin, Alexander Island, Antarctica Macdonald, David I. M. Moncrieff, Andrew C. M. Butterworth, Peter J. 1993-11 http://nora.nerc.ac.uk/id/eprint/517885/ https://doi.org/10.1130/0091-7613(1993)021<1047:GSDFAM>2.3.CO;2 unknown Geological Society of America Macdonald, David I. M.; Moncrieff, Andrew C. M.; Butterworth, Peter J. 1993 Giant slide deposits from a Mesozoic fore-arc basin, Alexander Island, Antarctica. Geology, 21 (11). 1047-1050. https://doi.org/10.1130/0091-7613(1993)021<1047:GSDFAM>2.3.CO;2 <https://doi.org/10.1130/0091-7613(1993)021<1047:GSDFAM>2.3.CO;2> Publication - Article PeerReviewed 1993 ftnerc https://doi.org/10.1130/0091-7613(1993)021<1047:GSDFAM>2.3.CO;2 2023-02-04T19:45:24Z 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 km3. 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. Article in Journal/Newspaper Alexander Island Antarc* Antarctic Antarctica Natural Environment Research Council: NERC Open Research Archive Alexander Island ENVELOPE(-69.895,-69.895,-71.287,-71.287) Antarctic Tilting ENVELOPE(-54.065,-54.065,49.700,49.700) |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
unknown |
description |
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 km3. 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. |
format |
Article in Journal/Newspaper |
author |
Macdonald, David I. M. Moncrieff, Andrew C. M. Butterworth, Peter J. |
spellingShingle |
Macdonald, David I. M. Moncrieff, Andrew C. M. Butterworth, Peter J. Giant slide deposits from a Mesozoic fore-arc basin, Alexander Island, Antarctica |
author_facet |
Macdonald, David I. M. Moncrieff, Andrew C. M. Butterworth, Peter J. |
author_sort |
Macdonald, David I. M. |
title |
Giant slide deposits from a Mesozoic fore-arc basin, Alexander Island, Antarctica |
title_short |
Giant slide deposits from a Mesozoic fore-arc basin, Alexander Island, Antarctica |
title_full |
Giant slide deposits from a Mesozoic fore-arc basin, Alexander Island, Antarctica |
title_fullStr |
Giant slide deposits from a Mesozoic fore-arc basin, Alexander Island, Antarctica |
title_full_unstemmed |
Giant slide deposits from a Mesozoic fore-arc basin, Alexander Island, Antarctica |
title_sort |
giant slide deposits from a mesozoic fore-arc basin, alexander island, antarctica |
publisher |
Geological Society of America |
publishDate |
1993 |
url |
http://nora.nerc.ac.uk/id/eprint/517885/ https://doi.org/10.1130/0091-7613(1993)021<1047:GSDFAM>2.3.CO;2 |
long_lat |
ENVELOPE(-69.895,-69.895,-71.287,-71.287) ENVELOPE(-54.065,-54.065,49.700,49.700) |
geographic |
Alexander Island Antarctic Tilting |
geographic_facet |
Alexander Island Antarctic Tilting |
genre |
Alexander Island Antarc* Antarctic Antarctica |
genre_facet |
Alexander Island Antarc* Antarctic Antarctica |
op_relation |
Macdonald, David I. M.; Moncrieff, Andrew C. M.; Butterworth, Peter J. 1993 Giant slide deposits from a Mesozoic fore-arc basin, Alexander Island, Antarctica. Geology, 21 (11). 1047-1050. https://doi.org/10.1130/0091-7613(1993)021<1047:GSDFAM>2.3.CO;2 <https://doi.org/10.1130/0091-7613(1993)021<1047:GSDFAM>2.3.CO;2> |
op_doi |
https://doi.org/10.1130/0091-7613(1993)021<1047:GSDFAM>2.3.CO;2 |
_version_ |
1766267688930246656 |