Other Craters
Impact craters generally have a rim with ejecta around them; in contrast volcanic craters usually do not have a rim or ejecta deposits. As craters get larger (greater than 10 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 will display layers in their walls. Since the collision that produces a crater is like a powerful explosion, rocks from deep underground are tossed unto the surface. Hence, craters are useful for showing us what lies deep under the surface.
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Valleys on the Ejecta Blanket from Cerulli Crater, as seen by HiRISE.
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Cerulli Crater Channels, as seen by THEMIS. Channels are on the inner north rim of the crater.
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Cerulli Crater, as seen by HiRISE.
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Semeykin Crater Drainage, as seen by THEMIS. Click on image to see details of beautiful drainage system.
Read more about this topic: Ismenius Lacus 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)