Table T4. Minerals identified by XRD, Site 1190.

Table T4. Minerals identified by XRD, Site 1190.

Core, section,
interval (cm) Unit Description XRD identification
major (minor, "trace") minerals*

193-1190C-

2R-1, 3-5 1 Fresh, aphyric, moderately vesicular rhyodacite with a small amount of pale blue alteration Plagioclase (opaline silica, augite, corrensite?, "smectite")

Core, section, interval (cm)	Unit	Description	XRD identification major (minor, "trace") minerals*
193-1190C-
2R-1, 3-5	1	Fresh, aphyric, moderately vesicular rhyodacite with a small amount of pale blue alteration	Plagioclase (opaline silica, augite, corrensite?, "smectite")

Notes: XRD = X-ray diffraction. * = the terms major, minor, and trace are applied to XRF analyses as explained in "Hydrothermal Alteration" in the "Explanatory Notes" chapter and do not imply quantitative abundances.