BIG TREE CREEK
near Yacolt, Clark County, Washington, USA
GEOLOGY
(Under Construction)
MINERALS
Cowlesite-
rare Ca-zeolite
- Clear to white mm-scale spheres in amygdules.
Epistilbite-
CaAl
2
Si
6
O
16
.5(H
2
O)
- Occurs as mm-scale clear tabular crystals twinned on {100}.
Spheres of
COWLESITE
on
chlorite
EPISTILBITE