The Salt Lake herald. [volume] (Salt Lake City [Utah]) 1870-1909, 1908-12-27
University Graduates Issue Work Geologic
Structure of San Francisco Range in Beaver County

some Salient Features OF the Ge-
oIogy OF Newhouse. Utah, and Vicin-
ity." is the title of a thesis prepared
oy six Of last years seniors of the Uni
versity Of Utah. Five hundred copies
OF the thesis have just been printed
and are now being issued by these
graduates The former students are
Joseph Jensen. r. c. fowler, Ralf
II. Woolley, Ernest 5. Bowman. H. E.
Havenor and Y. b. Herbst. All re-
ceived their degree Of Bachelor of Sci
ence in Mining Engineering last June,
when the paper WAS submitted TO the
faculty of the institution for approval
The thesis is of two-fold interest. in
that IL adds something OF value TO the
mining and geologic knowledge of one
Of the Oldest camps i'm Utah. il being
the first publication of this kind deal
ing with the old san Francisco min
ing district of Beaver county, and it is
of interest in the educational world, for
IL is the first printed paper of its KIND
ever issued 10y students of the Univer-
sity. The thesis is truly illustrative Of
what students of Utah's foremost in
stitution can do with but one year of
extra work i'm the branch with which
,he paper deals. The regular four-year
college course OF the Utah State school
of Mines gives but three years of work
8n me department of geology. These
students began their work in their
freshman year and thus were one year
ahead of their classmates. The thesis
NOW being issued. was prepared under
the guidance Of DR.. Fred J. Pack. the
newly appointed Deseret professor of
geology.
The san Francisco mining district is
one OF the oldest in Utah. Nearly for
~ years ago il was one of the biggest
producers of the state. From then I'M
iii now the camp has produced steadily
from at least one mine, the Horn Sill
Yer. Within recent years the district
has suddenly risen into prominence be-
cause of the work which is being done
ON the Cactus property by the New
house Mines q Shelters company.
Uncle Jesse Knight and David Evans
have recently become interested in the
district as well. The two properties to
which they are devoting their best en-
orgies are the Indian Queen, to the
north. aud the King David, in the
south. just west of the Horn Silver
mine. The Cupric Mining & Develop
ment company, of which but little is
heard through the press. is likewise in |
ing its energies to the old Iron Devil |
and Washington properties, both of
which were small producers during the /
palmy days when the Horn Silver |
smelters were operated in the camp.
Geologic Features of District
The San Francisco mountains. in
which the district is situated, are of |
the basin type. Through the district |
|
backbone is composed on the north of 1
quartzite. in the center of granite and |
on the south of limestone. with small /
Gaping of quartzite near the granite. |
The Quartzite is underlaid conform 4
ably by lime. The sedimentaries on /
either side of the central granite mass /
are of the same age. The granite /
mass. which has been thrust up into the /
sediinentaries, is irregular in outline, /
its western limit being covered by |
wash. The sedimentaries to the north /
OF the granite consist of 400 feet of /
limestone. 1900 feet of quartzite. $50 |
feet of slate, 1850 feet of quartzite, % /
feet Of conglomerate and so feet of /
quartzite. making a total thickness of /
S0S5 feet. The southern sedimentaries
consist of $500 feet of limestone. 200
feet OF garneuferous limestone, and $50
feet OF QuartZite, making a total of |
1850 feet Erosion is responsible for
the small amount of quartzite and alb
Sence OF slate on the south, and fault
ing is responsible for the smaller ex-
posed thickness of lime on the north.
The iSneous rocks consist of granite,
traehyte, rhyolite, and dolerite. with
slightly altered forms OF all of these
rocks The granite mass was injected /
into the sedimentaries before they were
Tilted. for at the present time the sedi-
mentary rocks of the north and south
show fairly uniform dip and strike.
except in places where il has been al
tered by faulting and local conditions
Following the uplift OF the Sedimentary
rocks the trachyte was introduced. II
lies to the east of the granite. The
granite mass is recognized as deep /