100-C 25-C 50-C 75-C C+M 50-C+M C+Y 50-C+Y M+Y 50-M+Y 100-M 25-M 50-M 75-M 100-Y 25-Y 50-Y 75-Y 100-K 25-K 25-19-19 50-K50-40-40 75-K 75-64-64
FIGURE 11 View of Endurance crater from the Opportunity Rover in Meridiani. The impact crater formed in a sequence of
horizontally layered rocks, which are exposed in the foreground and in the walls of the crater. The horizon in the background gives and
indication of how level the rock sequence is. The rover entered the crater and made measurements down section, almost to the center of
the crater. Burns Cliff, seen in Fig. 12, is on the far wall. (Mars Exploration Rover.)
FIGURE 12 View of Burns Cliff fromOpportunity Roverin Meridiani. The rocks consist of a mixture of evaporites, such as sulfates and
chlorides, and basaltic debris. The bedding patterns indicate that they were mostly deposited by the wind. However, the evaporites must
originally have been derived by evaporation of a nearby lake or sea.
Encyclopedia of the Solar System 2e©C2007 by Academic Press. All rights of reproduction in any form reserved. 329
