A Geoscience Digital Image Library

TitleBiotite gneiss, from Cuttingsville, Vermont, USA
DescriptionThis metamorphic rock is labelled a hornblende gneiss in the Ward’s Collection of Classic North American Rocks, but it contains no hornblende and the gneissose character is poorly developed. The dark mineral in this specimen is biotite, and most of the lighter colored (red to white) material is plagioclase. This sample is 9.5 cm across.
LocationUSA ▹ Vermont. Near Cuttingsville.
PhotographerMike Davis. 2001-04-26.
CollectionWard’s University Rock Collection #194.
Key wordsbiotite, gneiss, Vermont
Tech details709 KB. Hand specimen. Fujifilm FinePix S1Pro digital camera, 60mm Nikon AF micro lens.
GeoDIL number432