ISOSEISMALS: DISTRIBUTION OF APPARENT INTENSITY. 193 
to the ground. (See fig. 22.) A granary standing 100 feet farther west than the house 
was shifted southward about 3 feet. The movements of the house and granary were 
thus in nearly opposite directions. The dairy remained on its foundations. The barn 
was not shifted on the earth block supporting its greater part, but was dragged along over 
the other block. Movablesin the buildings were thrown about with violence; dishes, etc., 
were broken; but no buildings were destroyed and all were afterward repaired and used. 
A circular water-tank standing on a trestle about 12 feet high, approximately 100 feet 
northeast of the fault, was uninjured, and seemed to be absolutely undisturbed. In the 
barn-yard, which was traversed by the fault, cows were assembled and several men were 
engaged in milking. Cows and men were all thrown to the ground, the direction of their 
fall being northeastward and away from the fault. This direction was also downhill. 
The road from the Skinner place to Olema crosses a small creek, and near the bridge is 
a deep pool. Water from this pool was thrown out to the southwest, being carried across 
the road a total distance of 3 or 4 rods. 
Bolinas. — At the south end of the peninsula is a sloping plain carved by the sea when 
the land stood lower than it now does. Its general form and relations are shown by the 
contours of the map, fig. 10. This plain originally extended at least as far as the shore 
of Bolinas Lagoon, but east of Paradise Valley it has been modified by changes asso- 
ciated with the Rift. The line of Paradise Valley, when extended southeastward parallel 
to the fault-trace, marks approximately the limit of the Rift in that direction, and all 
the land between it and the fault-trace is broken into blocks which have been diversely 
faulted and tilted. As some of these blocks retain the smooth upper surface which they 
received as parts of the plain of marine denudation, their present attitudes serve to ex- 
press the nature of the dislocations. ‘Two small blocks facing the southern part of Bolinas 
Lagoon retain approximately their original height, but are tilted at different angles toward 
the northeast. A third block, too narrow to be caught by the map contours, has dropt 
50 feet lower and is tilted at a still higher angle toward the northeast. A fourth and 
much larger block, itself involving minor dislocations, slopes southward from a point 
opposite the head of Paradise Valley to the delta of Pine Gulch Creek. The upper part 
of the village of Bolinas lies in a curving fault-sag among these dislocated blocks, and 
another portion stands on the delta of Pine Gulch Creek. In the fault-sag, where the 
ground was much cracked, nearly all the houses were either shifted on their foundations or 
else thrown from their foundations. There was great destruction of furniture and other 
breakable articles. In some cases people were thrown from their beds, but none were 
seriously injured. Three buildings which had stood on stilts along the shore of the lagoon 
were tipt toward it so that their lower edges came within reach of the tide. Several 
buildings were so badly injured that they were afterward torn down by their owners 
instead of being repaired. Just outside the fault-sag, and only a few rods distant, a 
group of houses stand on higher ground, and these were comparatively uninjured. They 
were not moved on their foundations, and in one instance the chimneys were not 
thrown down. 
In the northern part of the town, standing on the delta of Pine Gulch Creek, about half 
the buildings were thrown from their foundations, and here also the destruction was 
greater on low flat land than on higher ground. 
Olema. — The village of Olema is about 0.5 mile east of the fault-trace and at the edge 
of the Rift belt, the greater part being included within the Rift. The residence of Mr. 
Pease, standing on alluvium, was shifted south about 2 feet, falling from its supports. 
It was very badly wracked, and was eventually torn down. A neighboring piece of allu- 
vial land bordering Olema Creek sank about 2 feet. The hotel owned by Mr. Nelson, 
standing on higher ground, was somewhat wracked but was not shifted. A house next 
door moved 2.5 feet to the northeast. A house opposite moved 2 feet to the northwest. 
Another house opposite fell from its supports, moving southwest. A neighboring stable 
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