111 Posted March 7, 2007 Share Posted March 7, 2007 does anyone know if the rock at Columns in Eugene is Columbia River Basalt? Quote Link to comment Share on other sites More sharing options...
gruntpltleader Posted March 7, 2007 Share Posted March 7, 2007 (edited) Let me know exactly where it is, but I don't think the the CRFB's came that far south. I think it is part of the Little Butte Volcanics or some of the other older cascade volcanics. College geology is kind of fuzzy yet, but look in Geology of Oregon, Orr and Orr. They would know if any one. Edited March 7, 2007 by gruntpltleader Quote Link to comment Share on other sites More sharing options...
Alasdair Posted March 7, 2007 Share Posted March 7, 2007 no its not Quote Link to comment Share on other sites More sharing options...
Ptown_Climber1 Posted March 9, 2007 Share Posted March 9, 2007 My understanding was that most of Oregon from around that area north was all Columbia River Basalt if you dig deep enough....Thanks to Missoula Floods it's mostly buried under rich topsoil scoured out of eastern Washington and Idaho. Ancient flows of the Columbia emptied out around Newport, so it could very well be. Quote Link to comment Share on other sites More sharing options...
MarkMcJizzy Posted March 9, 2007 Share Posted March 9, 2007 My understanding was that most of Oregon from around that area north was all Columbia River Basalt if you dig deep enough....Thanks to Missoula Floods it's mostly buried under rich topsoil scoured out of eastern Washington and Idaho. Ancient flows of the Columbia emptied out around Newport, so it could very well be. The definitive work on Columbia River Basalt distribution ( Bentley, Riedel, Swanson, and others (1987)), shows the CRB’s flowing out of the Columbia Basin, squeezed by the proto Cascades in the Columbia Gorge. The flows then entered the embayment of the Willamette, and extended to just south of Salem. In the Astoria area they were constrained by the Coast Range on the south. Breaching this, the flows traveled south along the coast, to at least Florence (if I remember correctly). I spent four fun filled days following the Columbia River Basalts to the ocean with Dr. Robert Bentley in 1984. Quote Link to comment Share on other sites More sharing options...
ivan Posted March 9, 2007 Share Posted March 9, 2007 voodoo witches! heretics! Quote Link to comment Share on other sites More sharing options...
111 Posted March 14, 2007 Author Share Posted March 14, 2007 thanks for the seriously indepth info folks! Quote Link to comment Share on other sites More sharing options...
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