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Impact of Upheaval Dome, UtahReexamination of Upheaval Dome in the Canyonlands National Park, Utah, shows that the structure of this remarkable feature conforms with that expected for a deeply eroded astrobleme. The structure is definitely not compatible with an origin due simply to plastic flowage of salt and other rocks in the underlying Paradox Formation. The most strongly deformed rocks are bounded by a series of circumferential listric faults. The convergent displacement of the rocks corresponds to the deformation that results from collapse of a transient cavity produced by high speed impact. From considerations of the probable depth of exposure of the impact structure and upward extrapolation of the listric faults, the final collapsed crater is estimated to be about 8 to 10 km in diameter; the impacting body was on the order of 0.5 km in diameter.
Document ID
19840015397
Acquisition Source
Legacy CDMS
Document Type
Other
Authors
Shoemaker, E. M.
(Geological Survey Flagstaff, AZ, United States)
Herkenhoff, K. E.
(California Inst. of Tech. Pasadena, United States)
Date Acquired
August 12, 2013
Publication Date
April 1, 1984
Publication Information
Publication: NASA. Washington Rept. of Planetary Geol. Program, 1983
Subject Category
Geophysics
Accession Number
84N23465
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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