Cometary Collisions and Geological Periods

Details Cometary Collisions and Geological Periods Cometary Collisions and Geological Periods

Mar 1973

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1973natur.242...32u&link_type=abstract

Nature, Volume 242, Issue 5392, pp. 32-33 (1973).

Mathematics

Logic

25

Scientific paper

SOME fifteen years ago, I suggested that tektites were produced by collisions of comets with the Earth1-3. Many detailed investigations of these objects have added much to our knowledge, and these, together with the lunar investigations, have proved this hypothesis to be very probably correct. I have also suggested that the geological periods were terminated by such collisions, but this was published in the Saturday Review of Literature, and no scientist except me, so far as I know, reads that magazine. The energy of such collisions and their frequency was roughly estimated at that time, and the number of these collisions has been reviewed again by Durrani4.

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