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Ancient granite gneiss in the Black Hills, South Dakota

January 1, 1964

Granite gneiss, with an age of approximately 2.5 billion years, in the Black Hills, South Dakota , provides a link betweeen ancient rocks in western Wyoming and Montana and in eastern North and South Dakota and Minnesota. The discovery suggests that early Precambrian rocks covered an extensive area in northcentral United States and were not restricted to several small nuclei.

Publication Year 1964
Title Ancient granite gneiss in the Black Hills, South Dakota
Authors R. E. Zartman, J.J. Norton, T. W. Stern
Publication Type Article
Publication Subtype Journal Article
Series Title Science
Index ID 70010765
Record Source USGS Publications Warehouse