Coastal Geomorphology, McMurdo Sound, Antarctica
Abstract Well-developed elevated beaches. deltaic deposits, marine-boulder pavements and wave-washed bedrock surfaces are found from Cape Bernacchi north to Granite Harbour. The highest measured marine feature, an elevated beach at Dunlop Island, is 20 m (67 ft) above sea-level. The highest beaches...
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Cambridge University Press (CUP)
1968
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crcambridgeupr:10.1017/s0022143000020657 2024-09-09T19:10:10+00:00 Coastal Geomorphology, McMurdo Sound, Antarctica Nichols, Robert L. 1968 http://dx.doi.org/10.1017/s0022143000020657 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000020657 en eng Cambridge University Press (CUP) Journal of Glaciology volume 7, issue 51, page 449-478 ISSN 0022-1430 1727-5652 journal-article 1968 crcambridgeupr https://doi.org/10.1017/s0022143000020657 2024-06-19T04:04:34Z Abstract Well-developed elevated beaches. deltaic deposits, marine-boulder pavements and wave-washed bedrock surfaces are found from Cape Bernacchi north to Granite Harbour. The highest measured marine feature, an elevated beach at Dunlop Island, is 20 m (67 ft) above sea-level. The highest beaches at Marble Point and Cape Roberts, about 48 km (30 miles) apart, are about 20 m (66 ft) above sea-level. The marine limit between these two points is, therefore, essentially horizontal. The highest beach at Cape Bernacchi. approximately 4.8 km (3 miles) south of Marble Point, is about 12 m (40 ft) above sea-level, Well-developed elevated beaches disappear about 3.2 km (2 miles) south of Cape Bernacchi and are not found between this point and Koettlitz Glacier. These beaches post-date the youngest glaciation recognized in the lower Wright Valley. A 14 C analysis of an elephant seal buried in a 13 m (44 ft) beach at Marble Point indicates that this beach is 4450 ± 150 years old. As sea-level at this time was approximately 3 m (10 ft) lower than at present. the Marble Point area has risen isostatically about 16 m (54 ft) during the last 4450 ± 150 years. Pitted beaches, beaches deposited on ice, a buried elephant seal and gravel ridges deposited by ice indicate that all of the beaches were formed in a climate like that now found in the area. Article in Journal/Newspaper Antarc* Antarctica Elephant Seal Journal of Glaciology Koettlitz Glacier McMurdo Sound Cambridge University Press Bernacchi ENVELOPE(163.850,163.850,-77.483,-77.483) Cape Bernacchi ENVELOPE(163.450,163.450,-77.467,-77.467) Cape Roberts ENVELOPE(-70.467,-70.467,-68.950,-68.950) Dunlop ENVELOPE(163.450,163.450,-77.233,-77.233) Dunlop Island ENVELOPE(163.500,163.500,-77.233,-77.233) Granite Harbour ENVELOPE(162.733,162.733,-76.883,-76.883) Koettlitz Glacier ENVELOPE(164.250,164.250,-78.250,-78.250) Marble Point ENVELOPE(163.833,163.833,-77.433,-77.433) McMurdo Sound The Beaches ENVELOPE(-56.832,-56.832,49.583,49.583) Wright Valley ENVELOPE(161.833,161.833,-77.517,-77.517) Journal of Glaciology 7 51 449 478 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
description |
Abstract Well-developed elevated beaches. deltaic deposits, marine-boulder pavements and wave-washed bedrock surfaces are found from Cape Bernacchi north to Granite Harbour. The highest measured marine feature, an elevated beach at Dunlop Island, is 20 m (67 ft) above sea-level. The highest beaches at Marble Point and Cape Roberts, about 48 km (30 miles) apart, are about 20 m (66 ft) above sea-level. The marine limit between these two points is, therefore, essentially horizontal. The highest beach at Cape Bernacchi. approximately 4.8 km (3 miles) south of Marble Point, is about 12 m (40 ft) above sea-level, Well-developed elevated beaches disappear about 3.2 km (2 miles) south of Cape Bernacchi and are not found between this point and Koettlitz Glacier. These beaches post-date the youngest glaciation recognized in the lower Wright Valley. A 14 C analysis of an elephant seal buried in a 13 m (44 ft) beach at Marble Point indicates that this beach is 4450 ± 150 years old. As sea-level at this time was approximately 3 m (10 ft) lower than at present. the Marble Point area has risen isostatically about 16 m (54 ft) during the last 4450 ± 150 years. Pitted beaches, beaches deposited on ice, a buried elephant seal and gravel ridges deposited by ice indicate that all of the beaches were formed in a climate like that now found in the area. |
format |
Article in Journal/Newspaper |
author |
Nichols, Robert L. |
spellingShingle |
Nichols, Robert L. Coastal Geomorphology, McMurdo Sound, Antarctica |
author_facet |
Nichols, Robert L. |
author_sort |
Nichols, Robert L. |
title |
Coastal Geomorphology, McMurdo Sound, Antarctica |
title_short |
Coastal Geomorphology, McMurdo Sound, Antarctica |
title_full |
Coastal Geomorphology, McMurdo Sound, Antarctica |
title_fullStr |
Coastal Geomorphology, McMurdo Sound, Antarctica |
title_full_unstemmed |
Coastal Geomorphology, McMurdo Sound, Antarctica |
title_sort |
coastal geomorphology, mcmurdo sound, antarctica |
publisher |
Cambridge University Press (CUP) |
publishDate |
1968 |
url |
http://dx.doi.org/10.1017/s0022143000020657 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000020657 |
long_lat |
ENVELOPE(163.850,163.850,-77.483,-77.483) ENVELOPE(163.450,163.450,-77.467,-77.467) ENVELOPE(-70.467,-70.467,-68.950,-68.950) ENVELOPE(163.450,163.450,-77.233,-77.233) ENVELOPE(163.500,163.500,-77.233,-77.233) ENVELOPE(162.733,162.733,-76.883,-76.883) ENVELOPE(164.250,164.250,-78.250,-78.250) ENVELOPE(163.833,163.833,-77.433,-77.433) ENVELOPE(-56.832,-56.832,49.583,49.583) ENVELOPE(161.833,161.833,-77.517,-77.517) |
geographic |
Bernacchi Cape Bernacchi Cape Roberts Dunlop Dunlop Island Granite Harbour Koettlitz Glacier Marble Point McMurdo Sound The Beaches Wright Valley |
geographic_facet |
Bernacchi Cape Bernacchi Cape Roberts Dunlop Dunlop Island Granite Harbour Koettlitz Glacier Marble Point McMurdo Sound The Beaches Wright Valley |
genre |
Antarc* Antarctica Elephant Seal Journal of Glaciology Koettlitz Glacier McMurdo Sound |
genre_facet |
Antarc* Antarctica Elephant Seal Journal of Glaciology Koettlitz Glacier McMurdo Sound |
op_source |
Journal of Glaciology volume 7, issue 51, page 449-478 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s0022143000020657 |
container_title |
Journal of Glaciology |
container_volume |
7 |
container_issue |
51 |
container_start_page |
449 |
op_container_end_page |
478 |
_version_ |
1809824726409805824 |