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Quasi-Periodic Bedding in the Sedimentary Rock Record of Mars

Lewis, Kevin W. and Aharonson, Oded and Grotzinger, John P. and Kirk, Randolph L. and McEwen, Alfred S. and Suer, Terry-Ann (2008) Quasi-Periodic Bedding in the Sedimentary Rock Record of Mars. Science, 322 (5907). pp. 1532-1535. ISSN 0036-8075.

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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.

Item Type:Article
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URLURL TypeDescription;322/5907/1532/DC1PublisherArticle
Lewis, Kevin W.0000-0003-3412-803X
Aharonson, Oded0000-0001-9930-2495
Grotzinger, John P.0000-0001-9324-1257
Additional Information:© 2008 American Association for the Advancement of Science. Received for publication 16 June 2008. Accepted for publication 10 November 2008. Supported by NASA's Mars Data Analysis Program and by the NASA Earth and Space Science Fellowship program. We thank two anonymous reviewers for helpful comments and suggestions. Supporting Online Material: Tables S1 to S6
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Issue or Number:5907
Record Number:CaltechAUTHORS:LEWsci08
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:12528
Deposited By: Archive Administrator
Deposited On:16 Dec 2008 00:52
Last Modified:03 Oct 2019 00:29

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