For this and other reasons, Schwartz says, scientists sometimes disagree on their interpretation of the same trench : " Sometimes I'll say, ` I think this is a fault trace,'and somebody else will say, ` Bull, that's a stream channel . "'
22.
The irregular hills which occur along the fault trace are a result of deformation of the sedimentary rocks by the faulting; some of the earliest petroleum production in California tap reservoirs formed by the deformation . ( Wilcox : Basic wrench faulting)
23.
The faults that run beneath Lake Tahoe, they said, must be considered active because Gardner's new map of the lakebed clearly shows that the fault traces cut through young sediments on the bottom, and that large earthquakes in the relatively recent past have apparently triggered huge landslides into the lake.
24.
The entire San Andreas Fault zone, with its many linked fault traces both large and small, marks the boundary between two great slabs of the earth's crust : the Pacific Plate, which for millions of years has been grinding northwestward in fits and starts past the North American Plate, which stands relatively still.
25.
On the foot wall side, many precarious and semi-precarious rock formations were observed and allowed for peak ground acceleration to be estimated at . 5 " g " ( within a kilometer of the fault trace ) while rock shattering and a lack of precarious rocks on the hanging wall side suggested a value near 1 " g " had been experienced at the time of the shock.
