Altoona
Wahkiakum County
Washington

"Apatite group mineral"
Calcite
Clinoptilolite
Chabazite
Dachiardite
Ferrierite
Mordenite
Opal
Quartz
Stilbite

Sources:

Tschernich, Rudy (1991)
Zeolites of washington State
Rocks and Minerals, Vol 66 No. 4, p. 302-308

Ream, Lanny R.(1991)
Washington Mineral Locality Index
Rocks and Minerals, Vol. 66 No. 4, p. 286-292

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