The Professional Geologist Volume 57 Number 4 FEATURES Peer Reviewed - Mining History


Historical Review of the Lovitt Gold Mine Wenatchee, Washington, USA Graham L Kelsey, CPG-11497, Roger D. Gill, Lorne Brown


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Peer Reviewed - Mining History Potash Discovery at McSweeny-McNutt #1 Commemorated by Roadside Marker Peter Smith, CPG-11539


Peer Reviewed - Sustainable Mineral Production


Natural Resources and Sustainability: Geoethics Fundamentals and Reality David M. Abbott, Jr., CPG-04570


Peer Reviewed - Sustainable Mineral Production Lost Secrets of Carlin Gold Exploration John Wood, CPG-10580


Peer Reviewed - Slope Stability 619


Apparent Cohesion and the Design of Slopes in Sand Quarries Dr. ir. Robrecht Schmitz, CPG-11917, Dr. ir. Christian Schroeder


Weird Sharks and Wright State Students Ryan Shell, SA-7165, Paige Wilms, SA-9748, Connor Motzko 34


Sri Lanka’s Miocene Jaffna Formation Fractured & Karstic Limestone Aquifer: the Sole Source of Drinking Water in the Jaffna Peninsula Barney Paul Popkin


Peer Reviewed - Sustainable Mineral Production The Retreat from Greenfields Mineral Exploration Was Ultimately Caused by the Growth in the Economic Importance of Open Pit Gold Mining Larry Brown, CPG-11408


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The Professional Geologist INSIDE THIS ISSUE


OCT.NOV.DEC 2020


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On the Cover: A small stream, Violet Creek, winds its way through Hayden Valley in Yellowstone National Park. Credit: Michael Poland, USGS. Public domain.

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