Author Affiliations +
David T. Pocknall,1,* James B. Riding,2 David K. Goodman,3 Jennifer M.K. O'Keefe,4 Thomas D. Demchuk5
1San Marcos, TX, USA
2British Geological Survey, Nottingham, UK
3The IRF Group Inc, Anchorage, AK, USA
4Department of Engineering Sciences, Morehead State University, Morehead, KY, USA
5Houston, TX, USA
*CONTACT David T. Pocknall ✉ pockodt@gmail.com Retired, San Marcos, TX, USA