Mascons, Mare Rock and Isostasy

Details Mascons, Mare Rock and Isostasy Mascons, Mare Rock and Isostasy

Jun 1970

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1970natur.226..924h&link_type=abstract

Nature, Volume 226, Issue 5249, pp. 924-925 (1970).

Physics

Scientific paper

THE nature of the large positive gravity anomalies discovered on the Moon1 (mascons) has been the subject of lively discussion. The high density (3.1 to 3.5 g cm-3) of mare rocks at Tranquillity Base2 supports one hypothesis-that mascons are surface sheets of high density volcanic rock3. The non-isostatic conditions of the mascon areas shown by the free-air anomalies4,5 may have terrestrial analogues. in some regions of recent volcanism where breaks in the crust have allowed dense basalts to pile up on the surface faster than isostatic balance can be maintained.

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