John Alan Glennon

John Alan Glennon (born September 24, 1970) is an American geographer and explorer. His work has been mapping and describing caves and geysers.

In 1996, Glennon and Jon Jasper discovered an entrance to the Martin Ridge Cave System, Kentucky, and explored connections to nearby Jackpot and Whigpistle Caves (Groves, C.G. 1998). The combined cave system is 51 kilometers (32 mi) long (Gulden, B. 2005). The cave is hydrologically connected to Mammoth Cave---the world's longest cave (Quinlan J.F. and Ray, J. 1989). Glennon also was involved in the discovery of one of the largest cave chambers in Kentucky (Yonker, R. 2003).

In 2002, Glennon led an American expedition to El Tatio Geyser Field, Chile. The team produced the first comprehensive inventory and description of the geysers' behaviors. The resulting report concluded that the site was the world's third largest geyser field (Glennon, J.A. and Pfaff, R.M. 2003).

With Dr. Chris Groves, president of the Cave Research Foundation (2004-2006), Glennon cofounded HERI in 1999. The Institute's mission is to study the environmental and geologic aspects of caves and karst landscapes. Headquartered at Western Kentucky University, HERI's major scientific focus has been on the karst issues of China.

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