Some meteor impact craters are easily recognisable due to well-preserved forms and features on the landscape. Other impact structures, such as Bigach Impact Crater in northeastern Kazakhstan, are harder to recognize due to their age, modification by geologic processes, or even human alteration of the landscape. Read more
Bigach is an impact crater in Kazakhstan. It is 8 km in diameter and the age is estimated to be 5 ± 3 million years (Pliocene or Miocene). The crater is exposed at the surface. Read more