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Mongolian summits: An uplifted, flat, old but still preserved erosion surface.
- Source :
-
Geology . Oct2007, Vol. 35 Issue 10, p871-874. 4p. 1 Color Photograph, 1 Black and White Photograph, 1 Graph. - Publication Year :
- 2007
-
Abstract
- In Gobi Altay and Altay, Mongolia, several flat surfaces, worn through basement rocks and uplifted during the ongoing tectonic episode to a similar altitude of 4000 m, suggests disruption of a single large-scale surface. New thermochronology and field data show that the plateau surfaces represent uplifted parts of an ancient peneplain that formed during Jurassic time. The Gobi Altay and Altay flat-topped massifs are tectonically and geomorphologically unique. Their preservation for ∼150 m.y. implies that no further tectonic movements occurred before the onset of the last deformation episode, 5 ± 3 m.y. ago. It also suggests that very low erosion rates were maintained by a dry climate over millions of years. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00917613
- Volume :
- 35
- Issue :
- 10
- Database :
- Academic Search Index
- Journal :
- Geology
- Publication Type :
- Academic Journal
- Accession number :
- 26746985
- Full Text :
- https://doi.org/10.1130/G23758A.1