Mercury’s Raditladi impact basin

 
Mercury’s Raditladi impact basin

This is a section of the floor of Raditladi impact basin about 40 kilometers wide that includes the mountains of the central peak on Mercury.
The slightly bluish tinge of features dubbed hollows has been exaggerated on the above image by the robotic MESSENGER spacecraft currently orbiting Mercury.
The rounded depressions appear different than impact craters and nothing like them has been noted on Earth’s Moon or anywhere else in the Solar System.
One progenitor hypothesis is that the hollows formed from the sublimation of material exposed and heated during the violent impact that created the Raditladi basin.

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