Kamensk crater

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Kamensk crater is an impact crater located 10 to 15 kilometres (6.2 to 9.3 mi) to the nord of Kamensk-Shakhtinsky town in Rostov Oblast, Russia. It is 25 km (16 mi) 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.[1] It may have formed at the same time as the smaller and nearby Gusev crater.

Kamensk crater
Landsat image of Kamensk crater
Impact crater/structure
ConfidenceConfirmed
Diameter25 km (16 mi)
Age49.0 ± 0.2 Ma
Eocene
ExposedNo
DrilledYes
Location
Coordinates48°21′N 40°30′E / 48.350°N 40.500°E / 48.350; 40.500
CountryRussia
StateRostov
MunicipalityKamensk-Shakhtinsky
Kamensk crater is located in Russia
Kamensk crater
Location of the crater in Russia

Description

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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.[2]

References

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  1. ^ "Kamensk". Earth Impact Database. Planetary and Space Science Centre University of New Brunswick Fredericton. Retrieved 2017-10-09.
  2. ^ Izett et al., 1994, LPI Contribution No. 825, p. 55-56