Map shows content and origins of the nation's geologic basement

A map showing the many different pieces of Earth's crust that comprise the nation's geologic basement is now available from the U.S. Geological Survey. This is the first map to portray these pieces, from the most ancient to recent, by the events that influenced their composition, starting with their origin. This product provides a picture of the basement for the U.S., including Alaska, that can help scientists produce regional and national mineral resource assessments, starting with the original metal endowments in source rocks.

Read the whole article on Physorg

More from Physorg