Geological processes and evolution
Abstract. Geological mapping and establishment of stratigraphic relationships provides an overview of geological processes operating on Mars and how they have varied in time and space. Impact craters and basins shaped the crust in earliest history and as their importance declined, evidence of extens...
Main Authors: | , , , , , , , , , |
---|---|
Other Authors: | |
Format: | Text |
Language: | English |
Published: |
2001
|
Subjects: | |
Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.474.9261 http://www.planetary.brown.edu/pdfs/2612.pdf |
id |
ftciteseerx:oai:CiteSeerX.psu:10.1.1.474.9261 |
---|---|
record_format |
openpolar |
spelling |
ftciteseerx:oai:CiteSeerX.psu:10.1.1.474.9261 2023-05-15T16:41:05+02:00 Geological processes and evolution J. W. Head R. Greeley M. P. Golombek W. K. Hartmann E. Hauber R. Jaumann P. Masson G. Neukum L. E. Nyquist M. H. Carr The Pennsylvania State University CiteSeerX Archives 2001 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.474.9261 http://www.planetary.brown.edu/pdfs/2612.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.474.9261 http://www.planetary.brown.edu/pdfs/2612.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.planetary.brown.edu/pdfs/2612.pdf text 2001 ftciteseerx 2016-01-08T07:31:30Z Abstract. Geological mapping and establishment of stratigraphic relationships provides an overview of geological processes operating on Mars and how they have varied in time and space. Impact craters and basins shaped the crust in earliest history and as their importance declined, evidence of extensive regional volcanism emerged during the Late Noachian. Regional volcanism characterized the Early Hesperian and subsequent to that time, volcanism was largely centered at Tharsis and Elysium, con-tinuing until the recent geological past. The Tharsis region appears to have been largely constructed by the Late Noachian, and represents a series of tectonic and volcanic centers. Globally distributed structural features representing contraction characterize the middle Hesperian. Water-related pro-cesses involve the formation of valley networks in the Late Noachian and into the Hesperian, an ice sheet at the south pole in the middle Hesperian, and outflow channels and possible standing bodies of water in the northern lowlands in the Late Hesperian and into the Amazonian. A significant part of the present water budget occurs in the present geologically young polar layered terrains. In order to establish more firmly rates of processes, we stress the need to improve the calibration of the absolute timescale, which today is based on crater count systems with substantial uncertainties, along with a sampling of rocks of unknown provenance. Sample return from carefully chosen stratigraphic units Text Ice Sheet South pole Unknown South Pole |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
ftciteseerx |
language |
English |
description |
Abstract. Geological mapping and establishment of stratigraphic relationships provides an overview of geological processes operating on Mars and how they have varied in time and space. Impact craters and basins shaped the crust in earliest history and as their importance declined, evidence of extensive regional volcanism emerged during the Late Noachian. Regional volcanism characterized the Early Hesperian and subsequent to that time, volcanism was largely centered at Tharsis and Elysium, con-tinuing until the recent geological past. The Tharsis region appears to have been largely constructed by the Late Noachian, and represents a series of tectonic and volcanic centers. Globally distributed structural features representing contraction characterize the middle Hesperian. Water-related pro-cesses involve the formation of valley networks in the Late Noachian and into the Hesperian, an ice sheet at the south pole in the middle Hesperian, and outflow channels and possible standing bodies of water in the northern lowlands in the Late Hesperian and into the Amazonian. A significant part of the present water budget occurs in the present geologically young polar layered terrains. In order to establish more firmly rates of processes, we stress the need to improve the calibration of the absolute timescale, which today is based on crater count systems with substantial uncertainties, along with a sampling of rocks of unknown provenance. Sample return from carefully chosen stratigraphic units |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
J. W. Head R. Greeley M. P. Golombek W. K. Hartmann E. Hauber R. Jaumann P. Masson G. Neukum L. E. Nyquist M. H. Carr |
spellingShingle |
J. W. Head R. Greeley M. P. Golombek W. K. Hartmann E. Hauber R. Jaumann P. Masson G. Neukum L. E. Nyquist M. H. Carr Geological processes and evolution |
author_facet |
J. W. Head R. Greeley M. P. Golombek W. K. Hartmann E. Hauber R. Jaumann P. Masson G. Neukum L. E. Nyquist M. H. Carr |
author_sort |
J. W. Head |
title |
Geological processes and evolution |
title_short |
Geological processes and evolution |
title_full |
Geological processes and evolution |
title_fullStr |
Geological processes and evolution |
title_full_unstemmed |
Geological processes and evolution |
title_sort |
geological processes and evolution |
publishDate |
2001 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.474.9261 http://www.planetary.brown.edu/pdfs/2612.pdf |
geographic |
South Pole |
geographic_facet |
South Pole |
genre |
Ice Sheet South pole |
genre_facet |
Ice Sheet South pole |
op_source |
http://www.planetary.brown.edu/pdfs/2612.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.474.9261 http://www.planetary.brown.edu/pdfs/2612.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766031528614166528 |