Ancient Granite Gneiss in the Black Hills, South Dakota

Details Ancient Granite Gneiss in the Black Hills, South Dakota Ancient Granite Gneiss in the Black Hills, South Dakota

Jul 1964

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1964sci...145..479z&link_type=abstract

Science, Volume 145, Issue 3631, pp. 479-481

Physics

2

Scientific paper

Granite gneiss, with an age of approximately 2.5 billion years, in the Black Hills, South Dakota, provides a link between 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.

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