Geology of Olympic National Park 

It is important to understand that the basalt of Siletzia did not completely slide off the plate onto the continent. Siletzia clogged the trench and broke the plate, twice, causing the trench to jump west and form the current Cascade Arc and a bunch of wide-ranging volcanics related to the slab rollback.

Thank you for this video

Thank you!

I love all the info in this video! Iv found some killer quartz and epidote in this area!

Thank you for all the knowledge. I'm looking forward to Big Bend if you do one!

"It's wuh-LA-muht, damn it." Thats what they told me at Oregon State, anyway. Beavs forever!

now i understand the formation of the mt olympia,

My experience is dominantly with the Crescent Formation. I mapped the soils from 1990-2000 throughout the Olympic National Forest.

I used to live in Pacific Beach,, we called it the Pacific Northwet.

Juan de Few-cah, not Juan de Foo-cah

You need to learn to correctly pronounce Willamette. Signed, an Oregonian

Too many pop -ups, bro!