Kamensk crater

Template:Short description {{#invoke:other uses|otheruses}} Template:Infobox terrestrial impact site Kamensk crater is an impact crater located Template:Convert to the north of Kamensk-Shakhtinsky town in Rostov Oblast, Russia. It is Template:Convert in diameter and the age is estimated to be 49.0 ± 0.2 million years old (Eocene). The crater is not exposed at the surface.<ref name=EIDBKamensk>Template:Cite Earth Impact DB</ref> It may have formed at the same time as the smaller and nearby Gusev crater.

Description

Six laser total-fusion analyses of the Kamensk impact glass have a weighted-mean age of 49.2 ± 0.1 Ma relative to sanidine from the Taylor Creek Rhyolite of New Mexico, that has an age of 27.92 Ma relative to a K–Ar age of 162.9 ± 0 Ma for a primary fluence-monitor standard SB-3 biotite or of 513.9 Ma for an international hornblende standard MMhb-1. This isotopic age of the Kamensk glass recalculated using a reference age for MMhb-1 of 520.4 Ma is 49.9 ± 0.1 Ma.<ref name=Izett1994>Izett et al., 1994, LPI Contribution No. 825, p. 55–56</ref>