Mathematics – Logic
Scientific paper
Sep 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975gsamb..86.1273m&link_type=abstract
Geological Society of America, Bulletin, vol. 86, Sept. 1975, p. 1273-1278.
Mathematics
Logic
24
Arches, Geomorphology, Lunar Maria, Lunar Topography, Ridges, Selenology, Photogeology, Structural Properties (Geology), Tectonics
Scientific paper
Lunar 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.
El-Baz Farouk
Maxwell Ted A.
Ward Stanley H.
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