Where's the Hayward Fault?

Map with a cross section showing a regional geologic interpretation on a direction perpendicular (northwest to southeast) with a projection of the land surface modified from a Google Earth projection of the Hayward Fault (viewed toward the northwest).

Richmond area cross section
Click here to open a legend of geology units.

The cross section cuts through the north end of Berkeley Hills (on the right) and the East Bay alluvial plain just south of Point Pinole (to the left).

For more information about geologic names and words in the legend, see glossary definitions (including Coast Range Ophiolite, Franciscan Formation, Great Valley Sequence, geologic time scale,gabbro, serpentinite, alluvium, and more).