TY - RPRT TI - Mineralogy and Morphology of Amphiboles Observed in Soils and Rocks in El Dorado Hills, California AU - G.P. Meeker AU - H.A. Lowers AU - G.A. Swayze AU - B. S. Van Gosen AU - S. J. Sutley AU - I. K. Brownfield PY - 2006 DO - 10.3133/ofr20061362 UR - https://pubs.usgs.gov/publication/ofr20061362 ID - ofr20061362 ER -