Rugged crater ejecta as a guide to megaregolith thickness in the southern nearside of the Moon
The southern highlands of the Moon comprise superposed ejecta layers, individually as thick as a few kilometers, from the major basins. Smaller (1-16-km-diameter) impact craters that penetrate this layered megaregolith and excavate material from depth have radar properties that provide insight into...
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Online Access: | http://hdl.handle.net/10088/16533 https://doi.org/10.1130/G25565A.1 |
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ftsmithonian:oai:repository.si.edu:10088/16533 2023-05-15T18:22:35+02:00 Rugged crater ejecta as a guide to megaregolith thickness in the southern nearside of the Moon Thompson, Thomas W. Campbell, Bruce A. Ghent, Rebecca R. Hawke, B. Ray 2009 application/pdf http://hdl.handle.net/10088/16533 https://doi.org/10.1130/G25565A.1 unknown Geology Thompson, Thomas W., Campbell, Bruce A., Ghent, Rebecca R., and Hawke, B. Ray. 2009. " Rugged crater ejecta as a guide to megaregolith thickness in the southern nearside of the Moon ." Geology . 37 (7):655–658. https://doi.org/10.1130/G25565A.1 0091-7613 http://hdl.handle.net/10088/16533 78759 doi:10.1130/G25565A.1 Journal Article 2009 ftsmithonian https://doi.org/10.1130/G25565A.1 2020-09-09T18:32:04Z The southern highlands of the Moon comprise superposed ejecta layers, individually as thick as a few kilometers, from the major basins. Smaller (1-16-km-diameter) impact craters that penetrate this layered megaregolith and excavate material from depth have radar properties that provide insight into the variability of megaregolith thickness above a postulated basement of large crustal blocks. We observe a significant difference in the population of radar-bright craters, 1-16 km and larger in diameter, between regions of the southeastern near-side highlands north and south of ~lat 48{degrees}S. There are about one-third more radar-bright craters north of this line than to the south, broadly coincident with the mapped boundary between southern deposits mapped as pre-Nectarian age and those of Nectarian-Imbrian age to the north. The radar-bright crater population is consistent with a megaregolith thickness of ~1.5 km in the north and ~2.5 km in the south, a difference we attribute to South Pole-Aitken basin ejecta. NASM NASM-CEPS Article in Journal/Newspaper South pole Unknown Aitken ENVELOPE(-44.516,-44.516,-60.733,-60.733) South Pole Geology 37 7 655 658 |
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Open Polar |
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Unknown |
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ftsmithonian |
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description |
The southern highlands of the Moon comprise superposed ejecta layers, individually as thick as a few kilometers, from the major basins. Smaller (1-16-km-diameter) impact craters that penetrate this layered megaregolith and excavate material from depth have radar properties that provide insight into the variability of megaregolith thickness above a postulated basement of large crustal blocks. We observe a significant difference in the population of radar-bright craters, 1-16 km and larger in diameter, between regions of the southeastern near-side highlands north and south of ~lat 48{degrees}S. There are about one-third more radar-bright craters north of this line than to the south, broadly coincident with the mapped boundary between southern deposits mapped as pre-Nectarian age and those of Nectarian-Imbrian age to the north. The radar-bright crater population is consistent with a megaregolith thickness of ~1.5 km in the north and ~2.5 km in the south, a difference we attribute to South Pole-Aitken basin ejecta. NASM NASM-CEPS |
format |
Article in Journal/Newspaper |
author |
Thompson, Thomas W. Campbell, Bruce A. Ghent, Rebecca R. Hawke, B. Ray |
spellingShingle |
Thompson, Thomas W. Campbell, Bruce A. Ghent, Rebecca R. Hawke, B. Ray Rugged crater ejecta as a guide to megaregolith thickness in the southern nearside of the Moon |
author_facet |
Thompson, Thomas W. Campbell, Bruce A. Ghent, Rebecca R. Hawke, B. Ray |
author_sort |
Thompson, Thomas W. |
title |
Rugged crater ejecta as a guide to megaregolith thickness in the southern nearside of the Moon |
title_short |
Rugged crater ejecta as a guide to megaregolith thickness in the southern nearside of the Moon |
title_full |
Rugged crater ejecta as a guide to megaregolith thickness in the southern nearside of the Moon |
title_fullStr |
Rugged crater ejecta as a guide to megaregolith thickness in the southern nearside of the Moon |
title_full_unstemmed |
Rugged crater ejecta as a guide to megaregolith thickness in the southern nearside of the Moon |
title_sort |
rugged crater ejecta as a guide to megaregolith thickness in the southern nearside of the moon |
publishDate |
2009 |
url |
http://hdl.handle.net/10088/16533 https://doi.org/10.1130/G25565A.1 |
long_lat |
ENVELOPE(-44.516,-44.516,-60.733,-60.733) |
geographic |
Aitken South Pole |
geographic_facet |
Aitken South Pole |
genre |
South pole |
genre_facet |
South pole |
op_relation |
Geology Thompson, Thomas W., Campbell, Bruce A., Ghent, Rebecca R., and Hawke, B. Ray. 2009. " Rugged crater ejecta as a guide to megaregolith thickness in the southern nearside of the Moon ." Geology . 37 (7):655–658. https://doi.org/10.1130/G25565A.1 0091-7613 http://hdl.handle.net/10088/16533 78759 doi:10.1130/G25565A.1 |
op_doi |
https://doi.org/10.1130/G25565A.1 |
container_title |
Geology |
container_volume |
37 |
container_issue |
7 |
container_start_page |
655 |
op_container_end_page |
658 |
_version_ |
1766201996219514880 |