![]() | Whakiakum County, Washington, USA |
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| SiO2- Occurs as curved mm-scale crystals. |
![]() Curved QUARTZ |
Wolfe, Edward W., McKee, Edwin H., 1972, Sedimentary and Igneous Rocks of the Grays Harbor Quadrangle, Washington, State of Washington Geological Survey Bulletin 1335, 70 pages. |