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Quasi-periodic bedding in the sedimentary rock record of mars

Science

By:
, , , , , and
DOI: 10.1126/science.1161870

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Abstract

Widespread sedimentary rocks on Mars preserve evidence of surface conditions different from the modern cold and dry environment, although it is unknown how long conditions favorable to deposition persisted. We used 1-meter stereo topographic maps to demonstrate the presence of rhythmic bedding at several outcrops in the Arabia Terra region. Repeating beds are ???10 meters thick, and one site contains hundreds of meters of strata bundled into larger units at a ???10:1 thickness ratio. This repetition likely points to cyclicity in environmental conditions, possibly as a result of astronomical forcing. If deposition were forced by orbital variation, the rocks may have been deposited over tens of millions of years.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Quasi-periodic bedding in the sedimentary rock record of mars
Series title:
Science
DOI:
10.1126/science.1161870
Volume
322
Issue:
5907
Year Published:
2008
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Science
First page:
1532
Last page:
1535
Number of Pages:
4