Faculty Mentor
Chad Pritchard
Document Type
Poster
Publication Date
2022
Department
Geosciences
Abstract
People don’t normally associate semi-precious gems with basalt or the “boring black rock” that dominates the Eastern Washington landscape. However, a site just northeast of Cheney in the West Planes of Spokane, shows where a system of gem-filled veins can be found nestled into the 16-million-year-old (Kasbohm and Schoene, 2018) Priest Rapids Member of the Wanapum Basalt that is a part of the greater Columbia River Basalt. The volcanic rocks are the host to millimeter - 10 cm wide fractures with variable colored agate and opal.
Recommended Citation
Markus, Matthew J., "Exceptional agate formation found in Spokane basalt" (2022). 2022 Symposium. 30.
https://dc.ewu.edu/srcw_2022/30
Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial-No Derivative Works 4.0 International License.
