Columnar Basalt at the Walla Walla County Rock Quarry
Walla Walla County Rock Quarry, Waitsburg, Walla Walla County, Washington, USA
Columnar basalt at the Walla Walla County Rock Quarry on Millrace Road in Waitsburg, WA. The vast portion of the basalt shown is vesicular in nature. Most of the vesicles are empty, but some contain various zeolites (as micro-xls), chalcedony (as small colorless→white nodules), and clay minerals (as orangish-brown earthy fillings). The quarry ...
© Bill Hamel