GSA Today
Volume 23, Number 7 (July 2013)

Cover image

About the cover:
View from Marshall Mesa southwest toward South Boulder Peak, Boulder County, Colorado, USA. Marshall Mesa, a former coal-mining site, is now part of Boulder County’s Parks and Open Space. Learn more at http://bit.ly/RHPqtr. Photo by Kea Giles.

© The Geological Society of America, Inc.