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Dames & Moore, 1999 - USDA Forest Service

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DESCRIPTION OF MAP UNITS<br />

Qs SURFlClAL DEPOSITS (QUATERNARY)--Mostly unconsolidated alluvium, collwium, and glacial<br />

materials. Includes reworked volcanic ash and pumice of postglacial eruptions of Glacier Peak volcano<br />

Tgr GRANITE ROCK (TERTIARY)-Granite rock, undifferentiated<br />

Rqd GRANITIC AND METAGRANITIC ROCK (lRIASSIC)--Commonly foliated and heterogeneous chlorite-,<br />

biotite-, and hornblende-bearing quartz diorite, metaquartz diorite, and gneiss or other metamorphic<br />

rock derived from originally plutonic rock<br />

pTgn GNEISS (PRE-TERTIARY)-Undifferentiated gneiss<br />

pTgnm GNEISS (PRE-TERTIARY)-Migrnatltic paragneiss and orthogneiss heterogeneously mixed with<br />

commonly abundant schist<br />

Ljg LAKE JUANITA LEUCOGNEISS<br />

Kbt BLACK PEAK BATHOLITH-Directionless-Weakly foliated phase<br />

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Ktgg GABRIEL PEAK ORTHOGNEISS<br />

nhc NORTHERN HETEROGENOUS CRYSTALLINE COMPLEX<br />

Ts WISP VALLEY SCHIST<br />

LEGEND<br />

X Mine location'<br />

# Area of multiple claim<br />

locations or altered rock1<br />

Properties at which lead is<br />

the principal value2<br />

D Properties at which copper<br />

is of secondary value2<br />

Properties at which arsenic<br />

is the principal value2<br />

Properties is of secondary at which value2 arsenic<br />

! 0 Properties at which lead is of<br />

I-.-. secondary value2 Properties at which zinc is<br />

'.<br />

-.\.<br />

Properties at which copper<br />

is the principal value2<br />

the principal value2<br />

O Properties at which zinc is of<br />

I<br />

i<br />

secondary value2<br />

-. x. \.-. -. from church et a/. BC-1 (aquatic reference<br />

'. '. -. riom Hunting reach sampling station)<br />

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A<br />

Refer to '. \. Division of Mines and EcoIogy, Bull. Na 37, V2.<br />

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8<br />

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Sources: Hunting, M M, 1956, Inwntory of Washington Minerals,<br />

Figures 4.2-4 and 4.2-5<br />

i<br />

Church, S.E., et al.. 1984, Mineral Resource Potential<br />

for Railroad Creek i<br />

Map of the Glacier Peak Wilderness and Adjacent<br />

i<br />

watershed geology I i Areas, Chelan, Skagit, and Snohomish Cwnties. WA<br />

! i US Geological Sum)i misc. Field Studies Map MF<br />

0 3 / i 1652-A.<br />

i<br />

i<br />

Miller. R. B., 1987, Geologic Map of the Twisp Riveri<br />

Chelan Divide Region, North Cascades, Washinstton<br />

Approximate i<br />

Holden Mine Site M~ller. R.<br />

Scale in Miles i<br />

6, 1987, Geologic Map of Part of the<br />

i McAlaster Mountain Quadrangle, Washington<br />

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37 b !\. Figure 4.2-3<br />

1 NORTH LAKE CHELAN BASIN GEOLOGY MAP<br />

AMES & MOORE<br />

WITH HISTORIC MINING ACTIVITY<br />

DAMES 6 MOORE GROW COMPANY<br />

693-005-019<br />

Holden Mine RIIFS<br />

Draft Final RI Report

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