File:Nested Craters on Mars.jpg

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Description

English: Impact craters that are only a few kilometers in size on Mars usually have simple bowl shaped interiors with craters in weaker material being larger than craters in stronger material.

Occasionally though, nature is more complicated and these simple rules don't apply. One such case is shown here where is appears as if there are craters nested within each other. These nested craters are probably caused by changes in the strength of the target material. This usually happens when a weaker material overlies a stronger material.

We can use craters like this to tell us something about what lies below the surface. What could be causing the change in strength in the subsurface? Mars has a lot of ice in its terrain near the surface. This ice-rich layer could be the weaker material and the deeper ice-free layer could be the stronger material.

Written by: Shane Byrne (1 August 2012)

Size of the crater is 5 km (an image with scale)

Location: 40.104° N, 125.005° E

Date

16 June 2012

Source

http://hirise.lpl.arizona.edu/ESP_027610_2205

Author

NASA HiRISE camera, Mars Reconnaissance Orbiter.

Permission
(Reusing this file)

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	05:32, 10 February 2014		1,011 × 705 (549 KB)	Tillman	{{Information \|Description ={{en\|1=Impact craters that are only a few kilometers in size on Mars usually have simple bowl shaped interiors with craters in weaker material being larger than craters in stronger material. Occasionally though, nature i...

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Impact crater

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