Landscape features in the Coloe Fossae region
Landscape features in the Coloe Fossae region
Along fault lines in Coloe Fossae, crustal blocks have sunk several hundred metres. The troughs were later filled with ice, which began to flow under its own weight and followed the contours of the terrain. As the ice melted and sublimated (evaporated), debris carried along on these 'block glaciers' was deposited as concentric crater fill or lineated valley fill. A cluster of small, ‘secondary craters’ on a highland ridge is the result of ejecta from a larger impact – a secondary crater field. Wind carried dark volcanic ash dust into the lowlands to the north 'dark material'.
