Terrestrial Analogs to Lunar Dimple (Drainage) Craters

Details Terrestrial Analogs to Lunar Dimple (Drainage) Craters Terrestrial Analogs to Lunar Dimple (Drainage) Craters

Feb 1970

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1970moon....1..237g&link_type=abstract

The Moon, Volume 1, Issue 2, pp.237-252

Physics

3

Scientific paper

In addition to modes of formation offered by previous investigators, terrestrial drainage craters formed over lava tubes in Oregon are presented as analogs to lunar drainage craters. Craters associated with lava tubes result from: (1) drainage of surface material through roof fractures; (2) plastic collapse of the partially cooled lava tube roof; and (3) drainage of surface material into roof collapses. The former two categories result in shallow, often elongate craters; the latter category forms classic ‘dimple’ shaped craters. Elongate dimple craters formed over volcanic fissures in southern Idaho are also discussed and presented in support of one mode of formation proposed by previous investigators for lunar drainage craters. Movement of surface material toward the orifice is initiated on Earth largely by wind and water; in lunar conditions, initial movement is attributed to micro- and macro-meteoritic bombardment, seismic disturbances generated by internal and external processes, and by thermal creep.

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