Coast Geological Society

Ventura, California

Next Meeting -Tuesday, 18 October 2016

Jerome DeGraff (CSU Fresno/ USFS) as the 
2016 AEG-GSA Jahns Distinguished Lecturer
will present his talk:

The Story of the Matthieu Landslide-Dam, Dominica, West Indies

CGS would like to thank Boles Racing for sponsoring the October 2016 meeting!

Jim and Stacey Boles have fielded a variety of race cars including karts on Santa Maria Karting Association's asphalt sprint track and a variety of open wheel dirt cars (Junior Midget, dwarf car and most recently a 360 sprint car) at Ventura Raceway, Santa Maria Raceway, Bakersfield Speedway and Victorville Raceway Park.

Talk Abstract 

Natural dams created by large landslides have blocked rivers in many parts of the world.  Upstream flooding from impounded water is often followed by later downstream flooding.  Consequently, these impacts call upon geologists involved with such events to make predictions or forecasts, especially about when later downstream flooding might take place.  The behavior of the Matthieu landslide dam in the small island nation of Dominica in the eastern Caribbean clearly illustrates how far off the mark these predictions can be.

Jerome (Jerry) De Graff
Speaker's Biography  

Jerry DeGraff served in positions designated as being either an environmental or engineering geologist on National Forests in Utah and California, during most of his 36 years in the US Forest Service.   Since retiring from government service in 2014, Jerry continues his geology career teaching graduate courses for the Department of Earth & Environmental Science at California State University-Fresno. 


He has authored or co-authored more than 60 contributions to journals, books, and proceedings volumes.  With Dr. Robert B. Johnson, he co-authored the textbook, Principles of Engineering Geology, which was awarded GSA’s E.B. Burwell Jr. Memorial Award in 1989 and AEG’s Claire P. Holdredge Award in 1990. In 2010, Jerry received the annual AEG publication award for the paper, “The formation and persistence of the Matthieu landslide-dam lake, Dominica, W.I.”, published in the journal, Environmental and Engineering Geoscience.

We are honored to have Jerry present to us as part of the Jahns Distinguished Lectureship, established in 1988, which is sponsored by the Association of Environmental and Engineering Geologists and the GSA Engineering Geology Division. Its purpose is to provide funding for distinguished engineering geologists to present lectures at colleges and universities in order to increase awareness of students about careers in engineering geology.

CGS is proud to be affiliated with the PSAAPG