Physics
Scientific paper
Dec 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984jgr....8911561g&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 89, Dec. 10, 1984, p. 11561-11572.
Physics
37
Cratering, Earth Surface, Hypervelocity Impact, Meteorite Craters, Ejecta, Mathematical Models
Scientific paper
A geometric model for the excavation and modification stages of simple crater development is presented. Cavity modification is modelled from an analytical derivation of the dimensions of the so-called transient cavity (Dence, 1973; Dence et al., 1977). The final cavity as it appears in terrestrial craters and the primary elements of excavation are approximated by a variation of the so-called Z model. The applicability of the model is tested with data from the Meteor and Brent craters. In the case of Meteor, the modelled final crater diameter at the original ground plane is within 26 m of the observed value and the modelled breccia lens and the rim crest volumes of the final true crater are within 9.5 percent and 2.5 percent, respectively, of the observed values. The correspondence for the more degraded Brent crater is less precise.
Garvin James B.
Grieve Richard A. F.
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