Logoisk crater
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Logoisk crater[a] or Logoisk astrobleme is a meteorite impact crater in Belarus near the city of Lahoysk.
| Logoisk crater | |
|---|---|
 Logoisk crater Location of the crater in Belarus | |
| Impact crater/structure | |
| Confidence | Confirmed |
| Diameter | 15 kilometres (9 mi) |
| Age | Middle Eocene 42.3 ± 1.1 Ma |
| Exposed | No |
| Drilled | Yes |
| Location | |
| Coordinates | 54°12′N 27°48′E |
| Country | Belarus |
| Municipality | Lahojsk |
It is 15 kilometers (9.3 mi) in diameter and is estimated to be 42.3 ± 1.1 million years old (Eocene). The crater is not exposed at the surface.[1]
The crater was discovered by an accident during a routine exploration drilling near the village of Kuzevichi in 1970s. A section was discovered with atypical materials in an unusual sequence: Quaternary deposits up to depth of 160m followed by a 230 meter thick layer of layered clays and lacustrine sediments followed by 240 meters of breccias, rocks previously unseen in the geology of Belarus. Three more drills made in 1976-1977 provided a clear evidence of the meteorite origin of the anomaly. Subsequent drillings mapped the crater.[2] During the period of intensive research it was suggested that the crater may contain diamonds formed due high temperature and pressure of the impact, but this has not been confirmed.[3]
Notes
- also Logoysk crater, Logoysk astrobleme, Logoisk impact structure, etc.