Clays in Wooly Patch rock in Gusev?
Wang A. Haskin L. A. Korotev R. L. Jolliff B. L. de Souza P. A. Jr. Kusack A. G. Athena Team.
Evidence of Phyllosilicate in Wooly Patch — an Altered Rock Encountered on the Spirit Rover Traverse [#2327]
"Rock Wooly Patch on West Spur has several specific physical and chemical features. Based on our analyses, phyllosilicates of kaolinite, serpentine, and chlorite types, plus some feldspar and pyroxene are prime candidates to constitute this rock."
http://www.lpi.usra.edu/meetings/lpsc2005/pdf/2327.pdf
Kaolinite is a type of clay.
Bob Clark
