Argyre Quadrangle - Other Craters

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. Often, craters with diameters greater than 100 km have rings on their floors. Since so much material is blasted away, the ground readjusts, making circular faults. When lava flows upward along the faults, rings are produced. 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.

• Wirtz Crater Dunes with ripples and frost, as seen by HiRISE.

• Bond Crater Floor, as seen by HiRISE.

• Hartwig Crater Floor, as seen by HiRISE. The scale bar is 500 meters long.

• Baltisk Crater Floor,as seen by HiRISE. Scale bar is 1000 meters long. Dark dunes are visible at the bottom of image on the left.

• Lohse Crater Gullies on Central Peak, as seen by HiRISE.

• Arkhangelsky Crater Dunes, as seen by THEMIS. Click on image to see possible gullies on central peak.