The Eureka sentinel. [volume] (Eureka, Nev.) 1902-current, 1915-10-16
new FAULT CAUSE
OF THE BIG QUAKE
Earth's Crust Drops Twelve
Feet For Distance of Thirty
Miles in Humboldt
j. County

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the Sonoma range of mountains along
the foothills of Mount Tobin, sixty
miles south of Winnemucca, is the
opinion of J. c. Jones. professor of
geology of the Nevada State Uni
versity.
Professor Jones and Professor
Boardman, of the engineering de-
partment of the university. arrived
from Reno Saturday morning and
left for Pleasant valley, accompanied
by Attorney L. G.. Campbell, with
Roy K. Brown as driver of their auto.
They returned last evening and Pro-
fessors Jones and Boardman left for
Reno.
Speaking of their observations
along the fault or break in the earth's
crust, which they examined from one
end to the other. Mr.. Campbell said to
a representative of 1.-The Winnemucca
Star"
1.-The northern end of the fault is in
the foothills of Mount Tobin. about
three miles from Mud Springs, and
it extends continuously almost due
south about 30 miles to a point a few
miles below the Cooper & Uniacke
ranch. AT its southern end the fault
spreads out like a hand. From a
distance the line of the break along
the fault resembles a railroad grade.
Measurements of the distance of the
slip or drop along the fault showed
it to be from IL to Is feet. The
angle of the fault is 81 degrees, the
di' being to the west, the earth hav-
ing moved in that direction. The
trend is almost due north and south.
I'm a few places along the break
we found slickenslides, as found on
the walls of veins. proving the plane
of action. The slickenslides showed
a slight movement of the sliding
mass to the north, but our observa-
tons of the break where it inter
sected fences, roads and irrigation
bitches showed the drop to be
straight downward.
I'm the valley and along the hill
sides near the Cooper & Uniacke
ranch there were many light frac-
lures, not along the line of the fault.
These fractures were caused by the
tremendous jar when the slip occur
red. This fracturing occurring on
the surface, is seen for miles. Sur
face water came up through these
cracks and the ground had the APP
pearance of being swept by an enor-
nous cloudburst
From u examination we found
no evidence of the great fault or slip
being the r%eopening of an old one,
the conclusion being that the slip
which caused the earthquakes was a
new one. However, there were indi-
cations of old faulting above the new
break, the old fault scarp showing
quite plainly.
Professor Jones, speaking of the
probability of other earthquakes,
with this section as the center of dis
turbance. gave it as his opinion that
there is no danger and that it will
probably be years before another
similar drop will occur on this fault
plane like those of the afternoon and
night of October 2. He said that
for two or three weeks, however,
light jars would probably occur, the
result of the settling of the great
mass of segments, which have to adj
just themselves after the great move
ment which occurred. To this set
thing is due the light shocks which
have occurred since the big one eight
days ago.
ut is probable that Professor Jones
will come to Winnemucca at an early
date and deliver a public lecture on
earthquakes. when he will fully and
plainly explain what caused the great
shake-up of October 2 which he said
was great enough in violence to be
felt in New York City. He also said
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