Spirit's miniature thermal emission spectrometer examined this rock, dubbed "Wishstone," and data indicated that the mineralogy of the rocks in this area is different from that of rocks encountered earlier in the plains of Gusev Craer or in the bedrock outcrops examined so far in the Columbia Hills inside the crater. Jumbled textures of specimens dubbed "Wishstone" and "Wishing Well" look like the product of an explosion, perhaps from a volcano or a meteor impact. These rocks are much richer in phosphorus than any other known Mars rocks. Spirit spent a few years exploring the Columbia Hills until it ceased to function in 2010. The rover's Rock Abrasion Tool (RAT) was used to drill into it, and the X-ray spectrometer indicated that there were higher levels of phosphorous than in the other rocks previously studied. Image taken on December 18, 2004.