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Jun 16, 2014 10:03 am
Interesting map from the Obsidian Studies Laboratory. There are apparently a couple of sources in the Clackamas, I'm surprised thought it was mostly basalt.
http://www.obsidianlab.com/image_maps/map_obsidian_oregon_map1.pdf
2 Replies
Jun 16, 2014 10:21 am
Rho Ridge and Lemiti Creek obsidian eh? Got a new reason to go explore that area in the future.
Jun 16, 2014 12:16 pm
What's the Clackamas River doing up in Hood River County?
Map seems off. Or needs explanation.