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Distribution, morphology, and origin of ridges and arches in Mare SerenitatisLunar mare ridges and arches in Mare Serenitatis were mapped to understand better their mode of formation. Maps of these features indicate that several pre-mare impacts in the Serenitatis area may be responsible for the localization of the circular ridge systems and that the subsurface, pre-mare topography is more complex than previously recognized. Apollo Lunar Sounder cross sections of ridge systems in southern Serenitatis indicate 50 to 100 m of local relief on these features. Small-scale features of ridges, such as medial lineations and lobate margins, do not conclusively define the origin of the ridges. However, estimates of crustal shortening from Lunar Sounder data and the coincidence of the major ridge system with the Serenitatis mascon suggest that ridges and arches were formed by gravitational readjustments of the mare fill along four probable impact structures and along a north-trending fracture pattern.
Document ID
19770060163
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Maxwell, T. A.
(Utah Univ. Salt Lake City, UT, United States)
Ward, S. H.
(Utah, University Salt Lake City, Utah, United States)
El-Baz, F.
(Smithsonian Institution, National Air and Space Museum, Washington D.C., United States)
Date Acquired
August 9, 2013
Publication Date
September 1, 1975
Publication Information
Publication: Geological Society of America
Subject Category
Lunar And Planetary Exploration
Accession Number
77A43015
Funding Number(s)
CONTRACT_GRANT: NAS9-12168
CONTRACT_GRANT: NSG-7090
Distribution Limits
Public
Copyright
Other

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