A Geoscience Digital Image Library

TitlePumpellyite and glaucophane in a bluschist
DescriptionThis fine-grained metamorphic rock is a type of blueschist. It contains mostly glaucophane (bluish) and pumpellyite (light green) but is so fine grained the minerals are hard to distiguish. Glaucophane is a sodic-amphibole, and pumpellyite is a Ca-Al-Mg mineral related to epidote. This sample is approximately 7 cm across.
LocationUSA ▹ California ▹ Sonoma County
PhotographerShannon Heinle. 2001-05-22.
CollectionUniversity of North Dakota Mineralogy Collection #1264.
Key wordspumpellyite, metamorphic, glaucophane
Tech details481 KB. Hand specimen. Fujifilm FinePix S1Pro digital camera.
GeoDIL number535