Baltisk is a crater in the Argyre quadrangle of Mars. It was named after a town in Russia in 1976. Baltisk is located on the western edge of the Argyre impact basin.

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  Topo map showing the location of Baltisk crater and other nearby features
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  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.
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  Baltisk crater, as seen by CTX camera on MRO. Dark areas are dunes. Fans are visible in the lower right.
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  Dunes in Baltisk crater, as seen by CTX camera. Note: this is an enlargement of a previous image.
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  Fans in Baltisk crater, as seen by CTX camera. Note: this is an enlargement of a previous image. Arrows point to layered parts of the fans.

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.