EARTH Magazine · From the archive
Originally published in EARTH Magazine. This article is part of our archive.
Oil and petroleum imports data are preliminary numbers taken from the American Petroleum Institute’s Monthly Statistical Report. For more information visit www.api.org.
June 14, 2018
Wallace P. Bolen, a mineral commodity specialist for the U.S. Geological Survey, compiled the following information on perlite, a mineral used …
January 29, 2019
By Amanda Brioche, USGS mineral commodity specialist PRODUCTION GEOLOGIC OCCURRENCE Boron does not occur in nature in an elemental state. It is …
January 15, 2019
PRODUCTION Geologic Occurrence Garnet is the general name given to a group of complex silicate minerals, all with isometric crystal structure and …
