Vicki Hansen, a structural geologist at the University of Minnesota, Duluth, says that Monte Carlo simulations by her former master's student, Emily Bjonnes, show that the destruction of ancient craters could have occurred gradually. (scientificamerican.com)
Iapetus with its equatorial ridge battered by ancient craters. (newscientist.com)
Much of the interior of the island is filled with ancient craters and rocky terrain, so you are in for quite an excursion. (amstardmc.com)