Chinoptilolite: A New Occurrence in North Carolina Phosphorite.
The zeolite, clinoptilolite, has been identified in a Miocene phosphorite deposit in North Carolina. It occurs in great abundance in the clay fraction of the phosphorite both as well formed, separate crystals and as clusters of crystals attached to granular particles.
Rooney
T P
TP
Kerr
P F
PF