Precambrian Basement Provinces Map - U.S.

Precambrian basement map

Detailed Description

Map showing Precambrian basement provinces of the United States and location of St. Francois Mountains terrane in southeast Missouri. Neodymium (Nd) line separates basement rocks with Nd model ages greater than (northwest side) and less than (southeast side) 1.6 Ga. Modified from Bickford et al. (2015).


Image Dimensions: 1280 x 848

Date Taken:

Location Taken: US