56 REPORT OF THE CALIFORNIA EARTHQUAKE COMMISSION. 
characteristic little gap or saddle (plate 314), and south of B follows closely an old fault 
line, with a slight upthrow on the west. North of the road the fault-trace follows a 
ravine for some distance, then passes along the west side of a low ridge, as indicated in 
the contouring, and finally drops down to Humboldt Creek. Thence it ascends the 
south slope of Telegraph Hill, 
following for a considerable 
distance a characteristic fault 
30" feature on the steep brushy 
Ge spurs indicated in plate 31p. 
Immediately south of the 
summit of Telegraph Hill the 
disturbance is the most pro- 
nounced, being accompanied 
apparently by an upthrow on 
the west side, resulting in a 
sharp-crested ridge some 4 feet 
high. It is possible, however, 
that this ridge is not the result 
of the recent disturbance, but 
of a former one, modified into 
a more acute form by the shak- 
ing off of the sod. (See plate 
3lc.) From the summit of 
Telegraph Hill a bearing was 
taken over the entire length 
of the line down to Shelter 
Cove: N. 25° W. Projecting 
the line north from the hill on 
the azimuth, it appears to 
head for a number of high 
mountains of the King’s Peak 
Range, altho no visible traces 
of the disturbance are found 
north of Telegraph Hill. Im- 
mediately north of its crest is 
the upper end of a great hop- 
per-like landslide, clean swept 
for over a thousand feet. 
The fault-trace is entirely ob- 
literated by this slide. The 
Cliffs." ~ exact location of the fault 
Fic. 10.— Map of country traversed by fault to north of north of Telegra h Hill was 
Shelter Cove, Humboldt County. re ey P Undersane 
impression that it past close to King’s Peak an ascent of this mountain was made, 
but without result. 
Of the auxiliary cracks, the first one, C (see fig. 11), is a less pronounced disturbance 
than the main fault-trace, passing thru a depression bordered on its east side by a low 
scarp due to former faulting. A small pond encircled by the road lies on this fault-trace. 
Its bearing (not measured) is such as to make the line converge toward the main fault- 
trace and intersect the same in the vicinity of the pond in the bottom of Wood Gulch. 
The horizontal displacement along this line is probably small, much like that on the 



A 
Scale in feet (approx.) 
te) 1000 2000 
Contour interval 10 feet (approximate) 
