EXPLANATION1998 debris flow

1998 slide

pre-1998 debris flow

pre-1998 slide

Recently modified land

Study area boundary

Scale 1:18,000

Projection UTM Zone 10

Datum NAD 1927

0 0.5 1 2 3 4 km

0 0.5 1 2 3 4 mi

U.S. DEPARTMENT OF THE INTERIOR

U. S. GEOLOGICAL SURVEY

SCIENTIFIC INVESTIGATIONS MAP 2859

CALIFORNIA

MAP LOCATION

MAP SHOWING RECENT (1997-98 EL NIÑO) AND HISTORICAL LANDSLIDES, CROW CREEK AND VICINITY, ALAMEDA AND CONTRA COSTA COUNTIES, CALIFORNIA

ByJeffrey A. Coe,1 Jonathan W. Godt,1 and Pierre Tachker2

1U.S. Geological Survey, Denver Federal Cener, MS 966, Denver, Colorado 80225

2Institut de Sciences et Techniques de Grenoble, Département Géotechnique, Grenoble, France

Pamphlet accompanies map

Fig. 4Fig. 4Fig. 4

Fig. 5Fig. 5Fig. 5

Fig. 6Fig. 6Fig. 6Fig. 6

Fig. 7Fig. 7Fig. 7

Fig. 2Fig. 2Fig. 2

Version 1.0

2004

Any use of trade names in this publication is for descriptive purposes only and does not imply endorsement by the U.S. Geological Survey.

This map was produced on request, directly from digital files, on an electronic plotter.

For sale by U.S. Geological Survey Information ServicesBox 25286, Federal Center, Denver, CO 802251-888-ASK-USGS

A PDF file for this map is available at http//geology.cr.usgs.gov

Manuscript approved for publication, October 21, 2004

Las Trampas Ridge

Dublin

Diablo

Hayward

USGS 7.5-Minute Quadrangle Index