THAT was the sound of the COLUMBIA RIVER BASALT FLOODS.
Lava, Lava Everywhere!
Driving here, with hawks circling soundlessly overhead, and a breeze barely making a ripple in the leaves, it’s hard to reconcile the fact that this peaceful place was forged in violence.
Very unusual volcanoes called Columbia River Basalt Floods (CRBG; ALSO KNOWN AS, shield volcanoes) erupted here.
The lava field became the 3rd biggest in the world (100,000 sq miles), after Iceland & the Siberian Trappes of 250 million years ago (the Great Permian extinction (3 million sq miles).
Over 300 high-volume lava flows have been identified.
Out of these, 21 poured through the Gorge, forming layers of rock up to 4,000 feet deep. Look at the cliffs in the Gorge today, can you see these layers?
The Yellowstone Super Volcano, as it is currently known, is believed to be the common source of the Columbia River Basalt eruptions, which formed the Columbia River Gorge.
More on Volcanoes & the Yellowstone Super Volcano
NEXT, the Birth of the Gorge:
2 million to 700,000 years ago--
From 2 million to 700,000 years ago, at the beginning of the last ice age; Hundreds of volcanoes erupted in the Cascade mountain range from central vents (strato volcanoes) rather than basalt floods. You can still see the 14 major peaks and hundreds of smaller peaks and cinder cones that form the range.
Let Us Know If You Have Any Questions About ANY OF THIS.
Our 1st stop is Chanticleer Point ('Portland Women’s Forum'), about 5 minutes away.