180 REPORT OF THE CALIFORNIA EARTHQUAKE COMMISSION. 
A number of landslides blocked the wagon road and railroad track north of the river. 
A particularly extensive one occurred north of the junction of the branches of the Gualala, 
burying the tracks under many tons of rock and loose débris. 
The railroad tracks of an abandoned logging road west of the Little North Fork show 
the effects of intensive longitudinal compression. The fault itself was 100 feet east of 
and parallel to the track along the stream bed, yet the rails have in several places been 
jammed lengthwise with sufficient force to cause sharp buckling. Stumps and cliffs on 
both sides of the track prevented the wholesale lateral sliding of the ties and localized 
the motion to a shifting of the ties a few feet lengthwise here and there. The kinks were 
so sharp as to cause the rupture of both rails in one place, and of the fish-plates joining 
the rail-ends in another. The track was narrow gage, with light rails, probably not 
exceeding 30 lbs. to the yard. In all 6 sharp kinks were counted within a distance of 
about 300 feet. (See plates 33c, D.) 
Annapolis, Sonoma County (G. W. Fiscus). — Buildings were destroyed and bridges 
wrecked in this neighborhood; landslides occurred and the waters of the Gualala River 
were thrown out 50 and 60 feet on a gravel bar. The river rose 12 or 14 inches in a few 
hours after the shock. The motion was from southwest to northeast. It started like a 
wave and then assumed a rotary motion, tearing and grinding. The formations under- 
lying the ranch are said by Mr. Fiscus to be hard-packed sand below the surface soil to 
a depth of 20 feet, then solid hard rock, as shown in a well 35 feet deep. In this well 
the earthquake broke out chunks of rock on opposite sides from within 10 feet of the top 
clear to the bottom. The line connecting the displaced rock on the two sides has a bear- 
ing of 8. 30° W. : 
In several places along the line of the fault fissure, the earth has opened so as to allow 
gravel to fall into the cracks. In other cases water and sand were shot out of the open- 
ings, the sand remaining. Chimneys were thrown to the southwest. 
Stewart's Point, Sonoma County. — The shock was felt very severely here and resulted 
in the destruction of an unusually large barn, formerly a lumber mill, used for the housing 
of lumber wagons. The structure was leveled to the ground. Small wooden dwellings 
were but little affected. All chimneys were damaged and the hotel lost the plaster from 
the walls of the lower floor. In the upper story the plaster sustained only a few cracks. 
The village lies about 2.5 miles west of the fault. 
Kast of Stewart’s Point the bridge over the South Fork of the Gualala River (plate 69D) 
was damaged by the slumping of the river terrace on which its south end rests. It was 
subjected to a strong longitudinal, compressive stress, which resulted in a slight upward 
buckling of the bridge floor near the southern end, and marked bending and twisting of 
the tension rods in the 2 southernmost panels. The supports at the south end further- 
more appear to have settled 13 inches, causing the floor and the last panel to assume a 
marked inclination. A hundred yards east of the wagon bridge is an older, dilapidated 
one, whose floor has been removed for some time. Its rickety aspect and crookedness 
render it an unsatisfactory object for study in this connection. There is, however, clear 
evidence of the slumping of the terrace at its south end, in a manner similar to that at 
the new bridge; yet the old bridge appears to have stood the compressive stress better 
than the new, and its south end has merely overridden the displaced masses of the terrace. 
On both sides of the sharp bend of the river east of the two bridges are extensive land- 
slides, making a clean sweep down the mountain side. The slide on the north side com- 
pletely blocked the wagon road and was being removed at the time of the visit (May 12). 
It is of such a height and steepness as to menace the road at this point with renewed 
sliding in future, especially during wet weather. 
Gualala Valley. — At Casey’s ranch, half a mile west of the fault, the destruction was 
notably severe, one building having entirely collapsed, and the dwelling-house having 
