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Small Rayed Crater Ejecta Retention Age Calculated from Current Crater Production Rates on MarsEjecta from impact craters, while extant, records erosive and depositional processes on their surfaces. Estimating ejecta retention age (Eret), the time span when ejecta remains recognizable around a crater, can be applied to estimate the timescale that surface processes operate on, thereby obtaining a history of geologic activity. However, the abundance of sub-kilometer diameter (D) craters identifiable in high resolution Mars imagery has led to questions of accuracy in absolute crater dating and hence ejecta retention ages (Eret). This research calculates the maximum Eret for small rayed impact craters (SRC) on Mars using estimates of the Martian impactor flux adjusted for meteorite ablation losses in the atmosphere. In addition, we utilize the diameter-distance relationship of secondary cratering to adjust crater counts in the vicinity of the large primary crater Zunil.
Document ID
20150005819
Acquisition Source
Jet Propulsion Laboratory
Document Type
Conference Paper
External Source(s)
Authors
Calef, F. J. III
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Herrick, R. R.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Sharpton, V. L.
(Alaska Univ. Fairbanks, AK, United States)
Date Acquired
April 17, 2015
Publication Date
March 7, 2011
Subject Category
Lunar And Planetary Science And Exploration
Meeting Information
Meeting: Lunar and Planetary Science Conference
Location: The Woodlands, TX
Country: United States
Start Date: March 7, 2011
End Date: March 11, 2011
Sponsors: Lunar and Planetary Inst.
Distribution Limits
Public
Copyright
Other
Keywords
Rayed Craters
Mars
Ejecta Retention Rate

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