Arizona Geological Society

Welcome to the Arizona Geological Society

Fall 2015 Field Trip

On 14-15 November, Jon Spencer, Phil Pearthree and Jordan Bright (Univ of AZ Ph.D. candidate) guided 30 AGS members and guests on an excursion in the northern Plomosa Mountains and to view the Bouse Formation in the Blythe Basin. The weather splendid, the rocks and Bouse outcrops brilliant, the audience engaged and argumentative (in a positive way), and the trip a smashing success.

A final draft of the field guide is available here.

On the following Tuesday, we canvassed trip participants for their experience. Over 75% completed and submitted an online survey published at We hope these data will inform future field trips.

The survey results and comments of those surveyed are available here

AGS Elects 2016 Executive Committee

From left to right; Marisa Lerew (Councilor), Stanley Evans Jr., (Councilor), Sarah Baxter (Councilor, Don Applebee (President), Ann Pattison (VP, Marketing), Alison Jones (Vice Treasurer), David Briggs (Secretary), Mike Conway (Past President), Carl Bowser (Councilor), Robert Hildebrand (VP, Field Trips).  Not present:  Robert Kamilli (VP, Programs), Rachel Feuerbach (Treasurer), Bruce Walker (Councilor) and Jason Miser (Councilor).

J. David Lowell Attends September Dinner Meeting

Karen Wenrich and Bob Cummings getting an autographed copy of Dave Lowell's autobiography

The Arizona Geological Society thanks J. David Lowell for attending the September 1, 2015 dinner meeting, where he autographed copies of his recently published autobiography, Intrepid Explorer:  The Autobiography of the World's Best Mine Finder. 

A native Arizonan, whose family roots date from territorial days, J. David Lowell was raised on a ranch near Nogales, Arizona to become one of the world's most successful exploration geologists.   He received a B.S. degree in Mining Engineering from the University of Arizona in 1949 and a M.S. degree in Geology from Stanford in 1957.

He has personally discovered more copper than anyone in history, contributing to the discoveries of the Kalamazoo, Vekol Hills and Casa Grande West deposits in Arizona, the JA Deposit in British Columbia, the Dizon and Far Southeast deposits in the Philippines, and the La Escondida, Zaldivar and Leonore deposits in Chile.  He is also personally responsible for the discovery of the San Cristobal Au-Ag mine in Chile and the 8-million ounce Pierina gold deposit in Peru. 

Dave Lowell has published more than 50 articles, including one of which he co-authored with John Guilbert in 1970 that defines the Lowell-Guilbert porphyry copper model.   This work remains a standard reference for exploration geologists, today. 

Dave Lowell is also a former member of the Arizona Geological Society and served as its president in 1966.

Dr. William R. Dickinson Passed Away on July 21, 2015

The geosciences community lost a giant on July 21, 2015.  Dr. William (Bill) Dickinson, Professor Emeritus at the University of Arizona, passed away apparently in his sleep, while in his hotel room in Nuku'alofa, Tonga.  Bill was working with archaeologist David Burley and his graduate student on the geology of some archaeological sites in Tonga.

 Bill Dickinson's contributions to the geosciences are legendary.    He was a true pioneer in the field of plate tectonic theory and its implications for geology in the western United States.  As a longtime member of  the Arizona Geological Society, he co-organized the 1981 AGS symposium on “Relations of Tectonics to Ore Deposits in the Southern Cordillera”  the proceedings of which were published as AGS Digest 14.   He also co-edited AGS Digest 18, “Mesozoic Rocks of Southern Arizona and Adjacent Area.”  AGS Digest 22, “Ores and Orogenesis: Circum-Pacific Tectonics, Geologic Evolution, and Ore Deposits” was dedicated in his honor.

 We offer our sincere condolences to Bill's family, friends and colleagues.  Bill was a great teacher, who touched and influenced many.  He will be missed, but his contributions to geology will endure.   May he rest in peace.

Recent AGS Publications

*New Spring 2015 Field Trip Guidebook for Download*Lindberg, Paul A., 2015, Oak Creek-Mormon Lake Graben, North-Central Arizona. Arizona Geological Society Field Trip, May 2, 2015, 12 p.

*New Fall 2015 Field Trip Guidebook for Download*  Spencer, J. E. and Pearthree, P. A., 2015, Fall 2015 Arizona Geological Society Field Trip Guide:  Northern Plomosa Mountains and Bouse Formation in the Blythe Basin. Arizona Geological Survey Open File Report, OFR-15-10, 24 p.

December 2015 Newsletter

December 2015 Dinner Sponsor


The Arizona Geological Society is grateful for
Ruen Drilling's sponsorship, which helps us to offset dinner meeting costs.

  For cancellations or changes please contact

Upcoming events - Register Here!

01 Dec 2015 6:00 PM • Sheraton, 5151 E Grant Rd. (& Rosemont), Tucson AZ 85712
05 Jan 2016 6:00 PM • Sheraton, 5151 E Grant Rd. (& Rosemont), Tucson AZ 85712
02 Feb 2016 6:00 PM • Sheraton, 5151 E Grant Rd. (& Rosemont), Tucson AZ 85712

Student Dinner Sponsor for 2015

Arizona Geological Society is grateful to Freeport-McMoRan, Inc. for their generous support of our student members!

Freeport-McMoRan is sponsoring student dinners for the 2015 AGS monthly meetings.

Update from the Ad Hoc Lindgren Collection Committee by Carl Bowser

The status of the Lindgren collection is being addressed by a small committee of AGS members in collaboration with Mark Barton at the University of Arizona.  The collection comprises rock and mineral specimens collected through the career of Waldmar Lindgren in his 31 years as a USGS geologist and from 1912 until his retirement, as a professor of geology at the Massachusetts Institute of Technology.  The collection of over 10,000 specimens was shipped to Tucson in 2001 with the funding provided by the Arizona Geological Society and the Tucson Gem and Mineral Society.  Stored for over 12 years in a federally owned, weather proofed storage building at the U.S. Department of Agriculture Research Center at the University of Arizona, the AGS has begun to explore the fate of the collection and how best it could suit the needs of the geologic community.

Bruce Walker with an example of a Mineral Specimen
from the Lindgren Collection

A committee comprised of Carl Bowser, Stan Evans, Rachel Feuerbach, Dick Jones, Bob Kamilli, and Bruce Walker recently reported to the AGS Executive committee with suggestions about responsibilities of interested parties, suggested disposition of the collection, and the AGS involvement in bringing the collection to the attention of a larger geologic community.

Critical items that face the committee and AGS are: the establishment of a working relationship with the U of A on the disposition and value of the collection, the need for a formal written agreement with the U of A on potential involvement of AGS in documentation of the collection, establishing the value of the collection to the larger geologic community, and the identification of a timetable for the proposed work and setting of protocols for documentation and making the geologic community aware of the collection. 

The Lindgren committee is strategizing arrangements with the U of A, and setting documentation protocols, provided the collection is deemed valuable enough to initiate the task of detailed cataloging. If and once the AGS working group decides to proceed with the project the help of volunteers with skills, such as, specimen examination and description, photo documentation, database merging techniques, and web development will be needed.

Purchase  Arizona  Geological Society Digests and Bulletins online at the Arizona Experience Store.

Click here for the Arizona Experience Store

AGS By Laws: "The object of the society shall be the promotion and encouragement of interest in the science of geology and in the geology of the State of Arizona."                                                                         Contact:

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