This image from NASAs Mars Odyssey shows a cross section of Nicholson Crater. The central peak of this crater is surrounded by a layered deposit that rises 3.5km (2 miles) above the crater floor.
This image from NASAs Mars Odyssey shows part of the floor of Becquerel Crater, including a large layered deposit. Becquerel Crater is located in Arabia Terra and is 165km (102 miles) in diameter.