Minerals of Big Tree Creek, Clark County, Washington, USA

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-	CaAl₂Si₆O₁₆.5(H₂O) - Occurs as mm-scale clear tabular crystals twinned on {100}.

Spheres of COWLESITE
on chlorite

EPISTILBITE