A Geoscience Digital Image Library

TitleGreenstone, Ely, Minnesota
DescriptionGreenstone is a generic name used for fine grained greenish rocks of this sort. They are generally derived by metamorphism of basaltic rocks but some form by metamoprhism of sediments derived from basaltic parents. Due to fine grain size, no minerals can be identified in this greenstone, either in hand sample or in thin section. Greenstones are found in many Precambrian terranes, including the area near Ely, Minnesota, where this specimen comes from. This sample is 8 cm across.
LocationUSA ▹ Minnesota. Near Ely.
PhotographerMike Davis. 2001-04-26.
CollectionWard’s University Rock Collection #198.
Key wordsgreenstone, Minnesota
Tech details835 KB. Hand specimen. Fujifilm FinePix S1Pro digital camera, 60mm Nikon AF micro lens.
GeoDIL number436