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Mascons, mare rock and isostasy

June 6, 1970

The nature of the large positive gravity anomalies discovered on the Moon (mascons) has been the subject of lively discussion. The high density (3.1 to 3.5 g cm−3) of mare rocks at Tranquillity Base supports one hypothesis—that mascons are surface sheets of high density volcanic rock. The non-isostatic conditions of the mascon areas shown by the free-air anomalies 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.

Citation Information

Publication Year 1970
Title Mascons, mare rock and isostasy
DOI 10.1038/226924b0
Authors Keith A. Howard
Publication Type Article
Publication Subtype Journal Article
Series Title Nature
Index ID 70226164
Record Source USGS Publications Warehouse