| Kamensk crater | |
| Map: | Russia |
| Coordinates: | 48.35°N 70°W |
| Confidence: | Confirmed |
| Diameter: | 25km (16miles) |
| Age: | 49.0 ± 0.2 Ma Eocene |
| Exposed: | No |
| Drilled: | Yes |
| Country: | Russia |
| State: | Rostov |
| Municipality: | Kamensk-Shakhtinsky |
Kamensk crater is an impact crater located 10kmto15kmkm (10milesto09mileskm) to the nord of Kamensk-Shakhtinsky town in Rostov Oblast, Russia. It is 25km (16miles) 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.
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]