Doug Shakel, well-known Tucson geologist, passed away last night as a result of a very aggressive cancer.
Doug was a long-time professor of geology at Pima Community College, who spoke out frankly about geologic issues in the region, not afraid of whose toes might be stepped on (eg, "Twenty Years Later - Have county actions since the 1983 flood made Pima County safer?" http://www.tucsonweekly.com/tucson/twenty-years-later/Content?oid=1073986 )
Doug retired a number of years ago but stayed active in the profession, most recently as Vice President for Field Trips for the Arizona Geological Society. [Right, Doug - top center with sunglasses - leading an AGS field trip to Hardshell - Red Mountain, Oct. 2009. Credit, Cori Hoag]
Recommended sources of information on Katla volcano
23 hours ago