Craters
Impact craters generally have a rim with ejecta around them, in contrast volcanic craters usually do not have a rim or ejecta deposits. Sometimes craters will display layers. Since the collision that produces a crater is like a powerful explosion, rocks from deep underground are tossed unto the surface. Hence, craters can show us what lies deep under the surface.
-
Layers in Terby crater, as seen by HiRISE. Layers may have formed when the Hellas basin was filled with water.
-
Terby Crater layers as seen by HiRISE.
-
Mounds in craters like Henry are formed by the erosion of layers that were deposited after the impact.
-
Schaeberle Crater, as seen by HiRISE. Image on right is an enlargement of the other image. Scale bar is 500 meters long.
-
Wiinslow Crater, as seen by HiRISE. Scale bar is 1000 meters long. Crater is named Winslow after small town just east of Meteor Crater in Arizona because of its similar size and infrared characteristics.
-
Saheki Crater Alluvial Fan, as seen by HiRISE.
-
Saheki Crater, as seen by HiRISE.
-
Close-up of Saheki Crater layers, as seen by HiRISE.
Read more about this topic: Iapygia Quadrangle
Famous quotes containing the word craters:
“Listen.
We must all stop dying in the little ways,
in the craters of hate,
in the potholes of indifference....”
—Anne Sexton (1928–1974)