A Geoscience Digital Image Library

TitleVishnu schist, Grand Canyon, Arizona
DescriptionThis sample of the Precambrian Vishnu Schist is quite fine grained. Mineral identification is difficult in hand specimen, but in thin section biotite, muscovite, quartz and plagioclase are easily seen. The Vishnu Schist is one of the oldest rock units in the Grand Canyon, and in North America. This schist averages about 1,700 to 2,000 million years old. This specimen is 9.5 cm across.
LocationUSA ▹ Arizona. Grand Canyon.
PhotographerMike Davis. 2001-04-26.
CollectionWard’s University Rock Collection #186.
Key wordsVishnu schist, schist, Arizona
Tech details832 KB. Hand specimen. Fujifilm FinePix S1Pro digital camera, 60mm Nikon AF micro lens.
GeoDIL number424