The sun. [volume] (New York [N.Y.]) 1833-1916, 1906-05-05
CAUSE OF CALIFORNIA QUAKE
0gOIOsISTS FIND 0REAv TAsLF
AI0N0 MOUNTAIN CRESs.
wnsl, Western s,spe vsH awsy Toward TIE
sea nvep ~ esest ~ rye Peet N
agme piaevs tteavaes Sine VASTLY
rgascsh.e s@r .si,es, paenilet 10 asssFe.

"
SEQ nvep 80 sseest ~ I'VE Peet n
sgme Piaer4 sIesvaes siRe Hsalj
Trasssh.e ssr sti.es, paeailei 10 ss1srr,
sAx F~naNcrsco, May 4-Dr. John q
Brannsr. head n tho department. u Rroloay
~ stanford University. haa announced
tho results u Investigations made BY a
party u student ~gsoloGl-ts. under his direc-
lion, into the effects ~ tho rscsnt eaFth-
quake on the conformatiou.of tho peninsula
upon which San Francisco stands.
A great fault has besn discovered In the
mountains back % Redwood city, extend
ing parallel with the line Of the sea-hore
north and sotRh for n distance OF four miles
along the crest Of the range. The cleavage
line vas discovered directly behind the
little village Of Woodside near the summit
OF tho range, on the road from Redwood Ia
Half Moon Bay, aud traced by the geolo-
gists without difficulty along the saddle
back Of the mountains.
In some places II IA manifested In the
shape Of q chasm from four inches TO Q foot
in width and Of considerable depth. AZ
other points a folding VI the crust and an
overlapping Of the surface strata bear evil
denoe Of the greatforoes operative to change
the conhguration OF the ground.
A geological map Of che district under
stress was made, and q bulletin embodyina
the complete report upon the phenomenon
will soon be published by the Geological
Department ct San Francisco University.
A year ago DR.. Brannery's class In ge-
ology mapped the came region. Thei,
Investigations now show that the regio n
west of the crevice now appearing at the
crest Of the range has fallen away toward
the sea. AZ places the discrepancy 10 as
much as two feet, thus showing that the
extreme western side OF the range Is parting
from the old location and moving toward
the ocean.
The sliding Of such an immense body Of
ground would be sufficient, say the ge-
ologists, to cause such a shock as that OF
April IL.
One student engaged upon the work was
injured the other day n has been taken
home. His name II Luther Lane, q junior
He was standing on the eastern side Of the
crevlce making a map. when there WA a
heavy rumble, followed by q shower OF
stones and earth that almost covered him
His companions dug him out. He Ia now
at his home near a Joee.
After the accident, which was caused
by one Of the series Of earthquake shocks
that have followed the initial shock OF
April IL, 10 was ascertalneu that there had
been a further widening Of the crevice in
some places. All Of this data Is now being
s~ystematiged for the forthcoming report
which DR.. Bremen will issue.
A detail of investigators from the Uni
versity Of California, under the direction
Of Prof. John Lawson, head Of the depart
ment Of geology at that university, is
making an independent survey Of the
region affected by the quake.
The peninsula upon which San Francisco
standsh has long been considered by the geol-
ogists a field representing peculiar features
Tor study. A we'll defined geological fault
due, II Is believed, to some CONFUSION OF
former times, has been recognized as one
Of the peculiarities OF the strata. This fault
extends laterally across the peninsula from
bay shore to ocean, some miles south Of
San Bruno, a southern suburb Of San Fran
cisco, The late Prof. Joseph Leconte, in
fault as a typical example Of that mani
festation Of geological topography.