This computer simulation was done at Los Alamos National Laboratory and completed at the University of Oslo Faculty of Mathematical Studies and Geological Processes under the supervision of Mr. Galen Gisler, a Los Alamos scientist who worked in Oslo for a couple of years. Mr Harald Dahle, the owner of Petrofilm cooperated with Mr. Gisler to make the presentation more life-like, with water and other details. The final video was shown at a 1983 fall meeting at American Geophysical Union, AGU and was well received. www.petrofilm.com