Computer Science
Scientific paper
May 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996m%26ps...31..413d&link_type=abstract
Meteoritics and Planetary Science, Vol. 31, p. 413-415 (1996)
Computer Science
5
Scientific paper
Irregular, dark green to black, glassy-looking boulders are locally common in the northwest portion of the rim of the Roter Kamm impact crater in southern Namibia. Their smooth surfaces, flow-like textures, presence of folds, and their similarity to melt bombs have led to the interpretation that these are molten impact ejecta. However, the samples we have examined are all Fine-grained breccias composed of angular fragments that show no evidence of melting. Meltlike surface textures of these rim breccias are largely a consequence of surface wind polishing of Fine-grained rocks in a desert environment. These monomict breccias were produced by impact-related brecciation of Gariep sediments (carbonaceous, siliceous shales) previously modified by low-grade Damaran metamorphism. Secondary quartz within the breccias is attributed to fluid activity that postdates the impact.
Degenrrrdt J. J.
Miller R. McG.
Reid Michael A.
Reimold Wolf Uwe
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