In which country is the Boltysh crater located?

The Boltysh crater is a buried impact crater in the Kirovohrad Oblast of Ukraine, near the village of Bovtyshka. The crater is 24 kilometres (15 mi) in diameter and its age is 16 million years, based on argon-argon dating techniques, less than 1 million years younger than Chicxulub crater in Mexico and the Cretaceous –Paleogene boundary.

Boltysh is located in in the basin of the Tiasmyn River, a tributary of the Dnieper River. It is 24 km (15 mi) in diameter, and it is surrounded by an ejecta blanket of breccia preserved over an area of 6,500 square kilometres (2,500 sq mi). It is thought that immediately after the impact, ejecta covered an area of 25,000 square kilometres (9,700 sq mi) to a depth of 1 metre (3.3 ft) or greater, and was some 600 metres (2,000 ft) deep at the crater rim.

It contains a central uplift about 6 km (3.7 mi) in diameter, rising about 550 metres (1,800 ft) above the base level of the crater. This uplift currently lies beneath about 500 metres (1,600 ft) of sediment deposited since the impact, and was discovered in the 1960s during oil shale deposits exploration. It was identified as a fossil meteorite crater in1975. By 1987, it was dated to 100 ± 12 million years old. Early age estimates could only be roughly constrained between the age of the impacted rocks (the target) and the age of overlying sediments. The target rocks date from the Cenomanian (98.9 to 93.5 million years ago) and Turonian (93.5 to 89 million years ago) epochs.