Arandas (crater) km in diameter) they usually have a central peak. The peak is caused by a rebound of the crater floor following the impact. Sometimes craters expose layers that were buried. Rocks from deep underground are tossed onto the surface. Hence, craters can show us what lies deep under the surface. Arandas (crater) Arandas Crater is a crater in the Mare Acidalium quadrangle of Mars, located 42.77° North and 15.17° West. It is 24.76 km in diameter and is named after the town of Arandas in Mexico. South is the scalloped terrain of Cydonia Labyrinthus and further south is Cydonia Colles,
Ritland crater Ritland crater The Ritland crater is an impact crater at Ritland farm in Hjelmeland municipality in eastern Rogaland county, Norway. The crater is about east of the village of Hjelmelandsvågen and about south of the Jøsenfjorden. The crater is about in diameter, and was created when a meteorite with an estimated diameter of struck here about 500–600 million years ago. The crater was later buried by sediments, of which it has been partly recovered. The structure was first discovered as a possible (suspected) impact crater in 2000 by geologist Fridtjof Riis. The Research Council of Norway has funded scientific research