Los Angeles herald., 1910-04-20
NEW CAMPS DESCRIBED

The town of Hornsilver, which lies
in Esmeralda county, twenty six miles
southwest of Goldfield, is described as
a promising camp, though when it was
visited only one mine had been devel-
oped far enough to ship ore. one or
two neighboring mines that were
worked forty years ago. but were aban-
doned on account of transportation
difficulties, have now been reopened.
Round Mountain, another camp de-
scribed, lies forty-five miles north OF
Tonopah. only one mine was exam
ined in detail, and this was found to
carry oxidized ore averaging $40 to $15
to the ton. The dirt at the foot of the
south stope of Round Mountain was
being washed by hydraulic power with
good results.
A large number of promising copper
mines have been opened at Yerington,
in Lyon county, Nevada. They al lie
in the Singatse ridge, close to the town,
and are strung out in chain two miles
long.
Most of them have shipped some OK
idized copper ore, but operations are
now confined to the sulphurized ores.
Some of them are old mines.
AsPHAITTTE DEPOSITS DESCRIBED
The asphaltite deposits of northern
Nevada are also described. The mate
rial closely resembles a deposit in
Oklahoma which has been fully ex-
amined. It looks much like coal, but 1t
is much lighter in weight. These de-
posits probably cover wide area, but
have not been fully explored as yet.
Their existence shows there was once
much petroleum in the region, but this
probably escaped long ago, owing to
the shattering of the rocks by geologic
disturbances
Western Oregon has produced con-
siderable gold and silver in past years,
but the bulletin describes only the Bo-
hemia and Cracker creek districts, in
which comparatively little work is now
in progress. The Bohemia district,
where mining has been done for years,
has produced perhaps 100000, mainly
in free gold. Prospecting in the region
is carried Oh rather vigorously, and 1t
is reasonable to suppose that other
workable deposits will sooner or later
be discovered, despite the dense mass
of vegetation that conceals them. The
Cracker creek district. in the Blue
mountain gold belt, lies across the
famous mother lode" Only one mine
was producing at the time 1t was VISIT
ed. but it was expected that others
would soon begin production.
NEW MEXICO MINES
The lead deposits at Tres Hermanas,
in southern New Mexico, have been
known for many years and have yield
ed about 100000 worth of metal. In
1904 zinc was discovered In TINS dis-
trict. and shipments were made to
smelters. There are also indications
of copper in this region.
The mines of the Hanover district,
in Grant county, New Mexico. have
yielded over a million tons OF iron IN
The ten years since they were opened.
Both hard and soft ores have been
extensively worked, but the principal
ore is magnetic. The output OF the
sdistrict is steadily increasing year by
year.
Wolframfte is an ore of tungsten
and is valuable in proportion to its
rarity. The deposits in Arizona are IN
Cochise county. Those that have been
found have been pretty well worked
out but others probably exist. The
ores lie in granite near its contact with
schist and in quartz vein that ira
verses the granite.
Arizona contains valuable marble
deposits, which are located in Cochise
county in the Chiricahua mountains.
The marble lies in thick zones in the
limestone strata and is widely distrlb-
uted. One claim includes ledge sew
enty-five feet thick and 250 miles long,
containing marble that is free from
defects. The material is well fitted for
interior decorative work and for gen
eral architectural uses.
The annual volume containing such
naners and preliminary reports on
economic geology to be published dur
ing the present year is now in prepa-
ration. Meanwhile copies of the last
volume (Bulletin $500 may be obtained
free of charge by writing to the dl-
rector of the United States geological
survey, washington, d. c.