Mathematics – Logic
Scientific paper
Mar 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985metic..20..125v&link_type=abstract
Meteoritics, volume 20, number 1, page 125.
Mathematics
Logic
1
Earth, Impacts, Craters, Astrobleme, Characteristics, Geology, Maps, Magnetic Properties, Petrology, Samples, Terrestrial, Topography, Magnetic Fields, Breccias, Clasts, Devitrification, Glass, Age
Scientific paper
This article summarizes information relevant to the interpretation of Lukanga Swamp - a depression some 52 km in diameter in central Zambia - as a considerably eroded astrobleme. The results of reconnaissance geological mapping, an airborne magnetic survey and petrological study of a small set of samples of impact rocks are presented. Circular topographic features coincide with a remarkably subdued magnetic field. A circular set of tangential faults indicates a diameter of the outer rim approximately 110 km. Polymict breccia occur, carrying marble megaclasts (klippes) up to 50 m long. Strongly shocked quartz clasts with several sets of decorated planar features are present as well as devitrified, flow-banded silica glass exhibiting decarbonation textures around marble clasts. Provisional correlation ofthe brecciation event with the local geological record suggests a Paleozoic age of the astrobleme.
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