quartzose graywacke

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quartzose graywacke [′kwȯrt‚sōs ′grā‚wak·ə]

(petrology)

A sandstone containing 50-85% quartz, chert, and metamorphic quartzite, 15-25% micas and micaceous metamorphic rock fragments, and 0-25% feldspars and feldspathic crystalline rock fragments.

A graywacke that has lost its micaceous constituents through abrasion and thus tends to approach an orthoquartzite.

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quartz-pebble conglomerate
quartzarenite
quartzite
quartzitic sandstone
quartzose
quartzose arkose
quartzose chert
quartzose graywacke
quartzose sandstone
quartzose shale
quartzose subgraywacke
quasar
quasi-acoustical holography
quasi-atom
quasi-cratonic

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