Kamensk crater is an
impact crater
An impact crater is a circular depression in the surface of a solid astronomical object formed by the hypervelocity impact of a smaller object. In contrast to volcanic craters, which result from explosion or internal collapse, impact crater ...
located to the south of
Kamensk-Shakhtinsky
Kamensk-Shakhtinsky (russian: Ка́менск-Ша́хтинский) is a town in Rostov Oblast, located on the Seversky Donets River. Population:
History
It was founded by Cossack settlers in 1686 and was granted town status in 1927.
A ...
town in
Rostov Oblast, Russia. It is in diameter and the age is estimated to be 49.0 ± 0.2 million years old (
Eocene
The Eocene ( ) Epoch is a geological epoch that lasted from about 56 to 33.9 million years ago (mya). It is the second epoch of the Paleogene Period in the modern Cenozoic Era. The name ''Eocene'' comes from the Ancient Greek (''ēṓs'', " ...
). The crater is not exposed at the surface.
It may have formed at the same time as the smaller and nearby
Gusev crater
Gusev is a crater on the planet Mars and is located at and is in the Aeolis quadrangle. The crater is about 166 kilometers in diameter and formed approximately three to four billion years ago. It was named after Russian astronomer Matvey Gusev ...
.
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
Sanidine is the high temperature form of potassium feldspar with a general formula K(AlSi3O8). Sanidine is found most typically in felsic volcanic rocks such as obsidian, rhyolite and trachyte. Sanidine crystallizes in the monoclinic crystal sys ...
from the
Taylor Creek Rhyolite of
New Mexico
)
, population_demonym = New Mexican ( es, Neomexicano, Neomejicano, Nuevo Mexicano)
, seat = Santa Fe
, LargestCity = Albuquerque
, LargestMetro = Tiguex
, OfficialLang = None
, Languages = English, Spanish ( New Mexican), Navajo, Ke ...
, 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
Hornblende is a complex inosilicate series of minerals. It is not a recognized mineral in its own right, but the name is used as a general or field term, to refer to a dark amphibole. Hornblende minerals are common in igneous and metamorphic rock ...
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.
[Izett et al., 1994, LPI Contribution No. 825, p. 55-56]
References
Impact craters of Russia
Eocene impact craters
Landforms of Rostov Oblast
{{RostovOblast-geo-stub