关于这张图
This image acquired by NASA's Mars Reconnaissance Orbiter on April 29, 2018, shows an impact crater approximately 23 kilometers across is home to fan-shaped deposits that extend from the rim and sit on the interior crater floor. Thick beds with varying tone are exposed along the edge of the fan. Shallow valleys that carve into the smooth upland surfaces outside of the crater may provide clues regarding the formation of the deposits. Many boulder-sized blocks sit on the interior crater floor beyond the toe (distal edge) of the deposits. This fan-hosting crater is located near the boundary bet…
