Looking a bit south of east from Ochoco State Park, we see a variety of rimrock basalts of varying ages. The one on the right has been named the Basalt of Meyers Butte, which has been dated at 5.42 +/- 0.11 Ma, and erupted west of this location. (Glad I looked it up: I had been under the impression these came from Newberry Volcano, which is way to the south.)
This PDF (see page 4) has a very similar photo to the one above, with the various basalt units labeled, and a field guide going into great depth about the volcanic stratigraphy of the area.
There are numerous reasons I wouldn't live in eastern Oregon, but the views and excellent, less weathered rock exposures make it a favorite place to visit.
Photo unmodified. September 7, 2016.
ZoomEarth location.
Posts
No comments:
Post a Comment