Antarctic Ice Sheet: Preliminary Results of First Core Hole to Bedrock
The Antarctic ice sheet at Byrd Station has been core-drilled to bedrock; the vertical thickness of the ice is 2164 meters. Liquid water—indicative of pressure melting—was encountered at the bed. Heat flow through the base of the ice sheet is estimated at 1.8 microcalories per square centimeter per...
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American Association for the Advancement of Science (AAAS)
1968
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Online Access: | http://dx.doi.org/10.1126/science.161.3845.1011 https://www.science.org/doi/pdf/10.1126/science.161.3845.1011 |
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craaas:10.1126/science.161.3845.1011 2024-09-09T19:10:40+00:00 Antarctic Ice Sheet: Preliminary Results of First Core Hole to Bedrock Gow, Anthony J. Ueda, Herbert T. Garfield, Donald E. 1968 http://dx.doi.org/10.1126/science.161.3845.1011 https://www.science.org/doi/pdf/10.1126/science.161.3845.1011 en eng American Association for the Advancement of Science (AAAS) Science volume 161, issue 3845, page 1011-1013 ISSN 0036-8075 1095-9203 journal-article 1968 craaas https://doi.org/10.1126/science.161.3845.1011 2024-08-08T04:01:07Z The Antarctic ice sheet at Byrd Station has been core-drilled to bedrock; the vertical thickness of the ice is 2164 meters. Liquid water—indicative of pressure melting—was encountered at the bed. Heat flow through the base of the ice sheet is estimated at 1.8 microcalories per square centimeter per second. The minimum temperature was -28.8°C at 800 meters; maximum ice density, 0.9206 at 1000 meters. Core studies reveal the existence of a chemically pure, structurally stratified sheet comprising bubbly ice to 900 meters that transforms to bubble-free deformed ice, with substantially vertically orientated c-axis structure, below 1200 meters. Below 1800 meters the deformed ice structure gives way to large annealed crystals. Several thin layers of dirt between 1300 and 1700 meters are tentatively identified as volcanic ash, and horizontally banded debris, including fragments of granite, is present in the basal ice. Article in Journal/Newspaper Antarc* Antarctic Ice Sheet AAAS Resource Center (American Association for the Advancement of Science) Antarctic Byrd Byrd Station ENVELOPE(-119.533,-119.533,-80.017,-80.017) The Antarctic Science 161 3845 1011 1013 |
institution |
Open Polar |
collection |
AAAS Resource Center (American Association for the Advancement of Science) |
op_collection_id |
craaas |
language |
English |
description |
The Antarctic ice sheet at Byrd Station has been core-drilled to bedrock; the vertical thickness of the ice is 2164 meters. Liquid water—indicative of pressure melting—was encountered at the bed. Heat flow through the base of the ice sheet is estimated at 1.8 microcalories per square centimeter per second. The minimum temperature was -28.8°C at 800 meters; maximum ice density, 0.9206 at 1000 meters. Core studies reveal the existence of a chemically pure, structurally stratified sheet comprising bubbly ice to 900 meters that transforms to bubble-free deformed ice, with substantially vertically orientated c-axis structure, below 1200 meters. Below 1800 meters the deformed ice structure gives way to large annealed crystals. Several thin layers of dirt between 1300 and 1700 meters are tentatively identified as volcanic ash, and horizontally banded debris, including fragments of granite, is present in the basal ice. |
format |
Article in Journal/Newspaper |
author |
Gow, Anthony J. Ueda, Herbert T. Garfield, Donald E. |
spellingShingle |
Gow, Anthony J. Ueda, Herbert T. Garfield, Donald E. Antarctic Ice Sheet: Preliminary Results of First Core Hole to Bedrock |
author_facet |
Gow, Anthony J. Ueda, Herbert T. Garfield, Donald E. |
author_sort |
Gow, Anthony J. |
title |
Antarctic Ice Sheet: Preliminary Results of First Core Hole to Bedrock |
title_short |
Antarctic Ice Sheet: Preliminary Results of First Core Hole to Bedrock |
title_full |
Antarctic Ice Sheet: Preliminary Results of First Core Hole to Bedrock |
title_fullStr |
Antarctic Ice Sheet: Preliminary Results of First Core Hole to Bedrock |
title_full_unstemmed |
Antarctic Ice Sheet: Preliminary Results of First Core Hole to Bedrock |
title_sort |
antarctic ice sheet: preliminary results of first core hole to bedrock |
publisher |
American Association for the Advancement of Science (AAAS) |
publishDate |
1968 |
url |
http://dx.doi.org/10.1126/science.161.3845.1011 https://www.science.org/doi/pdf/10.1126/science.161.3845.1011 |
long_lat |
ENVELOPE(-119.533,-119.533,-80.017,-80.017) |
geographic |
Antarctic Byrd Byrd Station The Antarctic |
geographic_facet |
Antarctic Byrd Byrd Station The Antarctic |
genre |
Antarc* Antarctic Ice Sheet |
genre_facet |
Antarc* Antarctic Ice Sheet |
op_source |
Science volume 161, issue 3845, page 1011-1013 ISSN 0036-8075 1095-9203 |
op_doi |
https://doi.org/10.1126/science.161.3845.1011 |
container_title |
Science |
container_volume |
161 |
container_issue |
3845 |
container_start_page |
1011 |
op_container_end_page |
1013 |
_version_ |
1809826241769897984 |