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horizon. If this adit is driven farther west it will doubtless enter the
downward projection of the limestone band along which the sulphide lenses
are found.

Other sulphide lenses are exposed in open-cuts along the north side
of the limestone band at distances of 500, 650, 800, and 900 feet, respectively,
west of the shaft. These occur along the north border of the limestone
along small faults, both as fissure fillmgs and as replacements of the
wall-rocks. The mineralization in the cut 500 feet west of the shaft is a
replacement of the limestone. The mineralized rock is of irregular outline,
averages 2 feet in width, and is exposed for about 30 feet. In the cut
150 feet farther west there is a sulphide lens about 25 feet in length that
has a maximum width of 7 feet. It consists largely of sphalerite and
pyrite with minor amounts of pyrrhotite. A representative sample of the
ore from this cut assayed: gold, 0-075 ounce a ton; silver, 1-45 ounces
a ton; zinc, 12-94 per cent. The two most westerly pits are 90 feet apart
and are sunk on the same body. It ranges from 2 to 5 feet in width in
these cuts and is well mineralized with pyrrhotite, sphalerite, and pyrite.
It is a replacement of calcareous argillite along a sheared zone lying
6 feet south of fossiliferous limestone.

At 100 feet north of the east end of the main limestone horizon,
a 20-foot long trench is sunk on a sheared zone 2 feet wide in andesite.
The sheared rock in the cut is lightly rust stained and is sparsely
mineralized. The shear zone strikes east and dips 70 to 80 degrees south.
West of the open-cut it runs into the limestone bed where its identity is
lost. No mineralization was noted at the contact of this fissure with the
limestone. East of the open-cut the sheared zone is exposed for 400 feet
in a horizontal direction and 375 feet in a vertical direction down the face
of a steep bluff. Where examined at the foot of the bluff, the shear zone
is 6 inches wide and is replaced by a little pyrite. From a convenient
point at elevation 5,150 feet, and 120 feet north of the vein outcrop at the
foot of the bluff, a crosscut adit was driven 25 years ago to intersect the
shear zone and explore the ground farther south. The adit is driven 345
feet in a southwest direction and the shear zone is intersected 150 feet
from the portal. Here the shear zone is less than a foot wide and contains
a sphalerite vein with a little pyrite ranging from 2 to 6 inches in width.

A calcite vein occurs along a fault in andesitie rocks between 70 and
150 feet south of the east end of the main limestone band. The vein
consists of brecciated and sheared andesite cemented by calcite with
variable amounts of galena, sphalerite, tetrahedrite, arsenopyrite, and
pyrite. It ranges from 6 to 18 inches in width and has been traced for
350 feet in a horizontal direction and 225 feet in a vertical direction by
two adits and by open-cuts. Below an elevation of 5,425 feet the vein is
covered by a steep talus slide. The fault in which the vein occurs has a
marked vertical displacement. The fault has a curving strike, changing
from south 80 degrees west to south 30 degrees west, and dips from
55 to 65 degrees southeast. At elevation 5,650 feet the fault is bordered
on the south by a body of limestone 50 feet in width. The limestone has
been heavily replaced along the fault by massive sulphides to form a body
of lenticular outline measuring 30 feet long and 15 feet wide. The sulphides
are present in the following order of abundance: pyrite, sphalerite, galena,