Mathematics – Probability
Scientific paper
May 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999sosyr..33..253k&link_type=abstract
Solar System Research, vol. 33, p. 253 (1999)
Mathematics
Probability
Scientific paper
Impact glasses from the Boltysh impact crater (Ukraine) were dated according to tracks of ^238U fission fragments. The investigation covered 288 glass chips, which practically have the same chemical composition, but differ in their U concentration and density of spontaneous fission tracks. The Boltysh Crater glasses are effective track detectors, but have a relatively low and only slightly varying degree of spontaneous fission track preservation. The obtained estimate of the age of the Boltysh structure, 65.04 +/- 1.10 (1 sigma) Myr, fits into the dispersion of K/Ar datings and is consistent with biostratigraphic data. The estimate-with a probability of approximately 80%-justifies the assumption that either the Boltysh structure is one of the impact craters formed by a collision of the Earth with a swarm of cosmic bodies at the Cretaceous-Paleogene boundary, or else the stream of crater-forming bodies increased at the end of the Mesozoic.
Kalinina Galina V.
Kashkarov Leonid L.
Kononkova Natal'ia N.
Lorents K. A.
Nazarov Michael A.
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