The Weiser signal. [volume] (Weiser, Idaho) 1890-1904, 1899-08-24

tion and the water courses OF the
country have cut down through the
granite. and cut down into soma Of
the porphyrys, and left - > general
rule, only the high portion covetsd
with granite, at the same time un-
covering portions OF the porphyry
territory covered by the granite over
now. No true states have been found
In this district, but frequent fragment
ary schistose states are encountered.
The formation Is evidently OF the pri-
mordial type, most probably belong
ing to the Archaen series.
This belt OF porphyry at this point
ID about one and one-half miles wide
as far as the erosion OF the granite
will permit OF observation; 1t runs
through the country in a regular
manner for fully 60 miles in north
westerly direction, and can be classed
as running in direct northerly d.
rection. Farther than the points
herein mentioned it has not been OBJ
served, but it undoubtedly continues
under the lava overfows to the south
and under the Iacustrine depnsits and
lavas to the east The formation is
one of series OF porphyry, .schist,
serpentines, ETC.. and other ancient
metamorphic and sedmentary and
metamorphic eruptive rocks, with
which it is cenformabie in course
and dip, that constitutes the Seven
Devils mountain range.
In close proximity TO the "What
Cheer group, and following the bed
ding and dip OF the porphyry, there
is dyke of granite quartz porphyry
: running through, varying in width
from so to $50 feet, and In places
carrying masses ofimprsoned schists
: showing clearly its eruptive character.
1 This dyke is clearly the separating
. point OF all the leads and different
minerals found in the district, and in
my opinion is the dividing point or
/ line between the silver lead and the
+ gold and copper ores. West OF this
It dyke the silver lead ores occur in the
i contact OF manganese lead extend
e ing the full length OF the dyke and
d cutting 1t in two; we'll to the north.
,e North OF this point the leads are
II broken, and can be traced by frag-
le ments here and there out Of the re-
)f gular line north and south. The OBJ
le servations we're taken north to the
is Salmon river, and south in the Min
q eral Mining District At Mineral
10 District the Snake river cuts in two
the formation and shows the mineral
h zone to continue into Oregon, and ir
lie tile Seven Devils Mining District a
g. the north end of the zone; the frs
disturbance found to cut the well de
fined leads in Horse mountain; mex
is are the water courses Of the Salmon
h. river.
The impression left on the careful
o. observer shows beyond question o
he a doubt that the heavy mineral de
he posits, and the least disturbed par
OF the mineral zone, aud where th,
greatest results will be obtained will
49, development, will be in the Heat
Il; Mining District. 1t shows from it
oh surface, and the erosion by natur
-. that it is probably the central miner
al body OF the entire zone.
MINERAL FEATURES.
NJ The "What Cheer" group Is sitr
- ated on the south and southwest slop
:. OF Railroad mountain about 800
,.r feet above sea level, and about $50
an feet vertically below the apex OF Il
80 mountain. 1t consists OF FIVE fu
- claims and fraction. The frsctit
~. is shown on the map under the nan
- of "Crescent" The full claims q
A.. 1900 by 600 feet.
- This entire location is an ex'enti'
-. on the northwest of the Sano
~. s.Railroad" mine The locAttdp -
"a ers four we'll. defined leads Me-