This crater formed from a meteorite hitting and exploding on Mars. It is situated on the northern Elysium Planitia .
(Planitia means a lowlying plain or large, relatively featureless lowlands)
Picture by Mars Orbiter Camera in July 1998.
The area surrounding this impact crater have been eroded away by wind. The harder ejecta of the crater, however, protected the area beneath the ejecta blanket from such erosion. This makes the ejecta appear raised above the surrounding area.
Picture by Mars Orbiter Camera in July 1998.
This picture covers a small portion of the floor of Alexey Tolstoy crater - in eastern Promethei Terra.
(Terra means heavily cratered highland)
The dark surface at the top of this image is rough and rocky. The rest of the area appears to be covered by brighter , smoother material.
It seems that the bright material has been been eroded back at the top of this image, exposing the darker surface below. The crater is still partly covered by this brighter material.
This high resolution photograph of an impact crater shows its walls, the raised rim, and ejecta material thrown out of the crater during a meteoric impact. The impact crater is located in Acidalia Planitia. The famous Meteor Crater in northern Arizona, U.S.A. has similar features, however this crater is around 4 times larger. The photograph covers and area 3 kilometers wide.
Pictures of two small impact craters on the planet Mars. It covers an area of 1.1 km by 1.4 km.
Each impact crater is surrounded by dark ejecta (material that was blown out of the crater) during the impact of a meteor. This darker material was blown out from underneath the surface of Mars during such an impact.
These craters are located in Terra Meridiani. Picture by the Mars Global Surveyor Mars Orbiter Camera.
