Figure F117 (continued). C. Blue-green vein cutting a diabase (interval 304-U1309D-15R-2, 72–74 cm) (FOV = 5 cm) and its XRD spectra. The vein-filling mineral(s) is not clearly identified, but the XRD spectra suggests the presence of amphibole (possibly cummingtonite), as suggested by the diffraction peaks at 10.8 and 28.9°2θ. D. Brown-green vein cutting a fine-grained diabase (interval 304-1309D-15R-1, 140–142 cm) (FOV = 5 cm) and its XRD spectra. XRD analysis allows the identification of amphibole and clays (diffraction peak at ~4–5°2θ) as the vein-filling minerals.
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