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Interaction of Martian Flow Ejecta Blankets with Pre-existing Impact Craters: Morphological ObservationsThe evidence of interaction between impact flow ejecta blankets and pre-existing landforms such as craters, scarps, and wrinkle ridges may yield important clues as to the nature of the ejecta emplacement process. The morphology of flow ejecta blankets and the interactions of these blankets with pre-emplacement impact craters were characterized. About 80 small satellite craters on or in 3 well-expressed low ejecta parent impact craters were recognized. Interaction of the blanket with pre-existing structures was studied, and several types were described. These are: (1) infilling; (2) encroachment; (3) overflow; and (4) breaching. Examination of the overall morphology of three ejecta blankets reveals a range of thickness, from depths sufficient to completely bury craters in the 5 km diameter range in distal areas of the blankets, to very thin blankets which allow subtle pre-existing topography to be visible within a half the diameter of the parent crater. Radial and azimuthal symmetries appear to exist within the blankets over a range of morphologies. It also appears that there is a weak linear correlation between the diameter of craters with nearly 100% infilling and distance from the center of the parent crater.
Document ID
19850015235
Acquisition Source
Legacy CDMS
Document Type
Other
Authors
Pieri, D. C.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Hurick, M.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Baloga, S. M.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
August 12, 2013
Publication Date
April 1, 1985
Publication Information
Publication: NASA, Washington Repts. of Planetary Geol. and Geophys. Program 1984
Subject Category
Lunar And Planetary Exploration
Accession Number
85N23546
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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