The Quarterly journal of the Geological Society of London (12895085713)

1864.1

BLAKE
NEVADA
TERRITORY.

321

in
their
relative
positions
in
the
annexed
sketch-section
across
the

region
from
Lake
Bigler
to
the
mountains
beyond
the
Carson.

Fig.
1.
—
Section
from
Lake
Bigler
to
the
Mountains
beyond

Carson
River.

Bigler
Lake.
Washoe
Lake.

Carson
River.

C
C
M
T
B

C.
Granite.

P.
Porphyry.

P'.
Porphyry
of
Sierra
Nevada.

B.
Porphyry-conglomerate
and

breccia.

T.
Horizontal
sandstone-strata
of

Chalk
Hill.

T'.
€lay-slate,
with
bitumen
and

brown
coal.

S.
Line
of
Thermal
Springs.

V.
Virginia
City
and
Cornstock

Lode.

M.
Metamorphic
rocks
near

Genoa.

In
this
section,
the
plains
along
the
course
of
the
Carson
are

shown
in
the
foreground,
with
the
slight
exposures
of
the
horizontal

Fig.
2.
—
Sketch
of
Granite-masses
near
Carson.

strata
of
sandstone,
and
those
at
the
Chalk
Hill,
supposed
to
be

Tertiary,
together
with
the
outcrop
of
porphyritic

conglomerate