Deseret evening news. [volume] (Great Salt Lake City [Utah]) 1867-1920, 1910-01-22

quently elevated so that they are now
practically above the reach of the
average ocean level This case is the
more remarkable because of the two
movements having occurred within
period so short.
SLIPS IN UTAH.
At times these crustal movements
take place so slowly and steadily that
they are not appreciable upon the sur
face, but more often the energy gem
Grated is cumulative and acts instant
~. giving rise to violent tremors. In
some cases the distance OF this vertical
movement may be measured In frac-
tionS OF an Inch and in others In many
feet The recent disturbances which
have visited Utah have likely ori2lnat-
ed through slips of not moro than per
haps a few hundrcdths of an inch.
The more active type OF seismls dis
turbance Is illustrated in the case OF
the Assam, India, disaster OF 1897.
which. in point of violence. surpassed
any others 70 historic record. 1t last
ed for nearly three minutes and lad
waste an area of 100000 square miles.
The country was rent with great fis-
sures. through which issued astound-
ing quantities OF water only to over
run the country and complete the aw-
lui WOIh VI u'N1ot1tloh
In some cases the less violent type
of earth movement does not manifest
itself upon the surface in the form of
rents and assures In other instances
quite the reverse Is the case, The dis
turbance which visited Yakatut bay,
Alaska. In 1899. resulted in elevatinG
the coast line at one point nearly bo
feet The Japanese earthquake OF
1891 was accompanied by fault 40
miles in length with yerticle dis
placement of 80 feet In the San Fran
cisco disaster OF 1896 the earth was
rent in two long parallel lines with
throws ranging up to 20 feet.
1t will therefore be noted that the
highly heated interior of the earth
with It's accompanying movements ef-
fects the surface in various ways and
degrees In some cases the surface
movement is gentle and followed with
but little destruction, and In other
cases 1t may be so violent as to lay
great areas in almost or quite COM
plete ruin. At times the carth's sur
face is not fractured and at others
great assures are formed hundreds of
miles in length with dlsplacements
often aggregating thousands of feet.
This crustal action Is mostly cumu-
lative-long periods of queiescence.
during which the energy is accumu-
lated. followed by short periods of
intense activity.
SITUATION IN UTAH
With the foregoing explanation of
the origin of crustal fractures 1t will
now be possible to proceed to an ex-
animation of these conditions in our
own state. 1t should be borne in mind
that at a period not geologically re-
this whole hp-
low sea level Late in Cretaceous
times and again in Tertiary times
mountain or orogenic movements set in
and finally terminated In raising this
country to it's present elevation. There
is good reason to believe that this ele-
waiting process is still operating.
AS a result of this the emergence
great fractures and assures We're form
ed within the surface strata. Some Of
these crustal blocks were elevated more
than others, and thus at the point OF
contact great bluffs or escarpments
were formed The Wasatch noun
tains owe their prominence to the fact
that they form part of O great up
thrown block. while to the westward
Salt Lake valley is downthrown The
dividing line between these great crust
al masses marks the western face of
these mountains. On the accompany
lnE map CillS tScHfPulcnl Is SHOWN as
sinuous line marked %. 1t extends
from Nephl in the south and passes
to the north just east OF Provo. Salt
Lake City and Ogden and terminates
at the northern extremity of the Wa
satch mountains near Collinston.. This
great fault plane has been the scene
of unusual displacement. The late
Clarence King has computed that the
throw of this fault is fully 10000 Feet.
a condition which is not paralelled by
any other instances recorded.
CEDAR CITY THE CENTER.
The Hurricane Fault marked on The
map (2) may almost be considered as
a southern continuation of the Wa
satch escarpment. 1t comes UP from
an unknown region in Arizona and
crosses the Utah line between Virgin
City and ST George and then passes
northeast beyond Cedar City, Beaver
and appears to die out before reach
ing Fillmore. The maximum throw Is
tust cast of Cedar City on the west
crn flank of Markagunt plateau whcr,
it reaches on an average. along q