GSA Today
Volume 27, Number 1 (January 2017)

About the cover:
Bird’s-eye view toward the SSE of the Smoking Hills in the Northwest Passage, Franklin Bay, Canada. Smoke is created by spontaneous combustion of bituminous shales of the Upper Cretaceous Smoking Hills Formation. This organic-rich shale is a source rock for some oil discoveries in the Mackenzie Delta. Photo taken from helicopter on 26 July 2010 courtesy Chrys Tremththanmor (www.featherlightphotography.co.uk). See related article, p. 4–11.

doi: 10.1130/GSATG274A.1

© The Geological Society of America, Inc.