All sorts of content about Oregon geology: its rocks, landforms and deep history.
Presented here at three different sizes with a precis of Oregon geology.
The Oregon Department of Geology and Mineral Industries covers the ground in all respects, including the free online quarterly
Oregon Geology.
The Cascades Volcano Observatory concentrates on the volcanoes of Oregon and Washington.
This volcanic province stretches into California and Washington too.
Many of these self-serve guides, listed by the Cascades Volcano Observatory, are in Oregon.
Perhaps the world's finest caldera, Crater Lake is on every geologist's life list.
A 1999 field trip by a Portland Community College class produced this gorgeous, well-annotated site.
A former quarry near downtown Eugene exposes excellent basalt columns
closeup here).
Look for these exhibits in Cascade Hall on the UO campus.
This tuff ring near Newberry Caldera is one of the most impressive sights in Oregon.
This Portland-based group is open to all. "Oregon country" extends to Canada and the Continental Divide.
Deeper than the Grand Canyon, the gorge of the Snake River is the heart of a large piece of wild land shared with Idaho.
Eocene through Miocene terrestrial fossils are exposed here like no other place.
A great outdoor classroom for contemporary volcanism in central Oregon.
Not just a cavern, but an ophiolite are preserved in this century-old park in the Siskiyou Mountains.
Learn about the geologic features found up and down this great coast.
Geology of the dunes is covered in the Siuslaw National Forest site.
The Oregon Outback may be the prettiest part of the Basin and Range.
A set of wallpaper photos from a perfect spring day in south-central Oregon.
A special site produced by the Forest Service and the Geological Society of America.
A gigantic fault block in eastern Oregon is composed of the oldest of the Columbia Basalts. The GORP site has the best introduction to this enticing destination.
A textbook tuff cone beside state route 31 in the Oregon Outback.
A backroads network in the lava lands of southern Oregon stretches from Crater Lake south into adjacent California.
About.com's David Sweet guides you to the best outdoor places to stay.
About.com's Matt Rosenberg helps get you oriented.
