Mudflat

Chinatown had become quite a village on the slopes of Knob Hill to the west.

The American city had expanded out over the tide flats.

Gradually high water mark receded further and further eastward and buildings appeared on the filled-in ground.

Many were supported on piles in the water, some only on a loose filling of whatever came to hand.

Both long, narrow inlets having the same general direction.

Plainly, at some remote period, there was a subsidence through here, just as in the San Andreas Canyon.

The fault line appears at the head of the bay at Bolinas and extends twenty miles over the rolling ground of the valley, just mentioned to the head of Tide Flats.

At the little town of Olema, a few miles south of Tamales Bay, a striking example of its action appears.