San Francisco Bay Region Geologic Map
Shows the distribution of geologic materials and geologic structures that are visible at the Earth's surface, with information about geologic materials, geologic time, fossils, and the geologic history of the San Francisco Bay region.
USGS Scientific
Expedition: Earthquake in Turkey - 1999
Scientists and engineers from the U.S. Geological Survey departed
for the epicentral region on August 19, 1999, less than 2
days after the quake occurred, to join in an international
scientific effort that will deploy seismic and geodetic instruments,
make geologic field measurements and assess and record the
structural damage.
1998 USGS
Expedition to Mongolia
In September 1998, USGS and other scientists investigated
surface ruptures associated with the 1905 Bulnay earthquakes.
During the field expedition, they sent updates of their observations
and progress in near real-time. These reports summarize their
geologic findings and approaches, along with their experiences
and observations from Mongolia (along with a few photographs,
too).
Paleoseismic
investigations of the Gurvan Bulag thrust fault in Mongolia
Scientists studied a total of five exposures (hand-dug
trenches and cleaned stream cuts) along the main Gurvan Bulag
thrust, and one exposure across a subsidiary fault.
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