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
 
EPSITILBITE