Tule Pond Paleoseismology Photo Gallery, September - October 2001
Digging a paleoseismic trench at Tule Pond on the Hayward fault
September 28, 2001
On September 28, 2001, paleoseismologists from the U.S. Geological Survey opened a trench on the southern Hayward fault at a site called Tule Pond, also known as Tyson's Lagoon, just south of the Fremont BART (Bay Area Rapid Transit) station in Fremont, California.
Taking a peel from the wall of the trench
October 2, 2001
On Tuesday October 2, 2001 Japanese scientists from the Geological Survey of Japan and Hiroshima University, along with USGS scientists, generated a peel of the southern trench wall at Tule Pond. By using a rubberized epoxy material, scientists removed a section of the south wall of the trench.
Using the Geoslicer
October 3, 2001
Then, on Wednesday, October 3, again at the Tule Pond location, Japanese and American scientists demonstrated the Geoslicer, a large, crane-operated device. The Geoslicer was placed in the bottom of the existing 10-foot-deep trench, where it cut an additional 12-foot-deep section of geologic deposits, and brought it, intact, to the surface for examination by the scientists.