Fig. 2. Mineralogical properties of Tehama County parent material: (A) x-ray diffractograms of interstratified chlorite–vermiculite, grossularite, diopside, and pumpellyite; (B) photomicrograph under crossed polarizers—the garnets (GN) are isotropic dark purplish black tightly packed small interlocking euhedral crystals and the ilmenite (IL) is brown; (C) backscatter electron (BSE) micrograph of diopside (Di), titanite (Tt), ilmenite (IL), and garnet (grossularite, GN); and (D) BSE micrograph of lighter gray pumpellyite (PU) intergrown into darker gray interstratified chlorite–vermiculite (CL-VR) upper left and center, with smaller masses of euhedral grossularite garnet crystals (GN) lower center but predominantly tightly packed and interlocked into larger masses (lower right).