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Ue V. DOLMAGE.

ore, when it is such a persistent mineral in all the other veins of
the district, is evidence of enrichment having taken place, but its
absence would naturally be expected since the primary solutions
would of necessity be low in iron in order that salleccs could
be deposited with only a trace of bornite.

The native silver might be regarded as evidence or enrichment,
but it is later than the calcite, which for the most part is later
than the white chalcocite, though earlier than the blue chalcocite.
It is, therefore, clear that it has been formed since the primary
chalcocite was deposited. In both claims where native silver oc-
curred, it was associated with malachite, which suggests that it
came from tetrahedrite and it might just as well have been pro-
duced by the carbonated waters which deposited the calcite, as
from any descending meteoric waters.

The King and Rainbow Veins.

The King vein is the largest one of a group of four, situated
on the south side of Hunter basin at an elevation of about 6,000
feet, at a point where the topography is exceedingly rough and
steep. The vein does not outcrop continuously throughout its
length but there is a fairly good alignment of all the outcrops
and workings and a rough continuity of strike which makes it
probable that it is one vein.

The total length is about 1,000 feet. The profile of the vein,
and the workings, are shown in Fig. 49, which represents a sec-
tion through the center of the vein and parallel to the strike.

The width of the vein varies from 10 inches to 3 or 4 feet.
The walls are sharply defined against the tuff country rock. In
a few places a small amount of reddish hematite gouge was
found along one or another of the walls. The walls stand nearly
vertical, and the strike of the vein is at an angle of about 45 de-
grees to the strike of the bedding of the tuffs, which dip 18 de-
grees to the northeast.

The composition of the vein varies from place to place along
its strike. At the farthest north pit the vein has a width of about
4 feet and consists almost entirely of banded quartz containing