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Igneous vs impact processes for the origin of the Mare lavasThe respective role of external vs internal processes is considered. The inner Orientale basin was formed by the explosive impact of an asteroidal body. Within minutes after the impact, the concentric fracture system developed as an adjustment to the stresses generated by the shock wave. Examples are presented to illustrate that the upwelling of lava in the center of Mare Orientale and several craters on its ejecta blanket occurred well after the asteroidal collision which generated the bulls-eye structure. Thus, the lavas were not strictly impact melts. However, a close relationship may have existed between the impact and subsequent volcanism.
Document ID
19740027291
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Gornitz, V.
(NASA Goddard Institute for Space Studies New York, N.Y., United States)
Date Acquired
August 7, 2013
Publication Date
April 1, 1973
Publication Information
Publication: The Moon
Volume: 6
Subject Category
Space Sciences
Accession Number
74A10041
Distribution Limits
Public
Copyright
Other

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