A Geoscience Digital Image Library

TitleAugen gneiss, near Grass Lake, St. Lawrence County, New York
DescriptionThis gneiss contains augen (“eyes”) of pink coarsely crystalline feldspar with biotite at their cores. Biotite, quartz, and light gray plagioclase are present throughout the sample. This specimen is 10 cm across.
LocationUSA ▹ New York ▹ St. Lawrence. Near Grass Lake.
PhotographerDarla Sondrol. 2001-04-10.
CollectionWard’s Collection of Classic North American Rocks #89.
Key wordsaugen gneiss, Gneiss, New York
Tech details1.16 MB. Hand specimen. Fujifilm FinePix S1Pro digital camera; 60mm AF Nikon micro lens.
GeoDIL number338