| Obolon' crater | |
|---|---|
  Location of the crater in Ukraine | |
| Impact crater/structure | |
| Confidence | Confirmed |
| Diameter | 20 km (12 mi) |
| Age | 169 ± 7 Ma Middle Jurassic |
| Exposed | No |
| Drilled | Yes |
| Bolide type | Iron meteorite? |
| Location | |
| Coordinates | 49°35′N32°55′E / 49.583°N 32.917°E /49.583; 32.917 |
| Country | Ukraine |
| State | Poltava |
Obolon' crater (Ukrainian:Оболонь) is a 20 km (12 mi) diameter buriedmeteoriteimpact crater situated about 200 km (120 mi) southeast ofKyiv inUkraine (Poltava Oblast).[1][2]The site has been drilled, which revealed the presence of shocked minerals and impact melt rock; the highchlorine content of the latter suggesting that the area was covered by shallow sea at the time of impact.[3]One estimate puts the age at 169 ± 7 million years (MiddleJurassic).[4]
It has been suggested byGeophysicist David Rowley of theUniversity of Chicago, working with John Spray of theUniversity of New Brunswick and Simon Kelley of theOpen University, that Obolon' may have been part of a hypothetical multiple impact event which also formed theManicouagan impact structure in northernQuebec,Rochechouart impact structure inFrance,Saint Martin crater inManitoba, andRed Wing crater inNorth Dakota.[5] All of the craters had previously been known and studied, but their paleoalignment had never before been demonstrated. Rowley has said that the likelihood that these craters could be aligned like this due to chance is nearly zero.[6]
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