Compositional variations

Compositional variations

. This enhanced color mosaic shows volcanic flows with relatively high titanium content (blue), volcanic flows that are low in titanium but rich in iron and magnesium (green, yellow and light orange), and heavily cratered highlands that are typically poor in titanium, iron and magnesium (pink and red). In this view, taken by Galileo as it flew over the northern region on 7 December 1992, bright pink highlands surround the lava-filled Crisium impact (bottom) and the dark blue Mare Tranquillitatis (left) is richer in titanium than the green and orange maria above it. The youngest craters have prominent blue rays extending from them. (Courtesy of JPL and NASA.)

Copyright 2010, Professor Kenneth R. Lang, Tufts University