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The structure and evolution of ancient impact basins on MarsIt is pointed out that characteristic styles of degradation and modification of obvious Martian basins make it possible to recognize more subtle expressions. This approach is seen as providing not only additional basins to the existing inventory but also fundamental clues for initial impact basin structure and stratigraphy. It also reveals the long-lasting influence of basin formation on the crust of Mars in spite of extensive erosion and resurfacing. Consideration is given to five clear examples of modified impact basins, and regions around each that have undergone similar processes (fracturing, collapse, channeling) are delineated. These processes among the different basins are then compared, and similar zones of modification are correlated with concentric basin rings. Consideration is then given to the implications of these observations for current models of basin formation and to the role of impact basins in controlling regional tectonics. The results indicate that large multiring impact scars leave a major but sometimes subtle imprint on the geologic structure of stable crustal regions on Mars.
Document ID
19830034340
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Schultz, P. H.
(Lunar and Planetary Institute Houston, TX, United States)
Schultz, R. A.
(Arizona State University Tempe, AZ, United States)
Rogers, J.
(American Petrofina Company of Texas Houston, TX, United States)
Date Acquired
August 11, 2013
Publication Date
November 30, 1982
Subject Category
Lunar And Planetary Exploration
Accession Number
83A15558
Funding Number(s)
CONTRACT_GRANT: NASW-3389
Distribution Limits
Public
Copyright
Other

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