We used standard well-site and core-logging methods
(Blackbourn, 1990), optical microscopy, X-ray diffraction, and X-ray
fluorescence to characterize the lithology, meso- to micro-scale
structure, mineral composition, and geochemistry in the near-fault
environment. Detailed sample analyses were based on thirty samples
taken at approximately 65 cm spacing over the entire depth range of
Phase 3 spot core. Additional analyses of samples from Phase 3 core
are reported in the Phase 3 Core Photo Atlas (www.earthscope.org/
safod) and in several other publications