BLANCHARD HILL
north of Mt. Vernon, Washington
GEOLOGY
UNDER CONSTRUCTION - Plesase visit
Washington Geology Vol. 26 No.4 December 1998
for more information.
MINERALS
Stilpnomelane-
K
5
Fe
48
(Si
63
Al
9
)O
168
(OH)
216
.
12H
2
O
- Micaceous black radial aggregates in white quartz matrix
STILPNOMELANE