GEOLOGY OF THE PACIFIC NORTHWEST! Part 2: Exotic Terranes! 

For so little views and so little subscribers you've done a really good job here thank you.

Very well done story of a most complicated episode of PNW Geology. The speaker is awesome. More of this tyoe content please!

So great. My sons didn’t want to watch but gradually started paying attention and are now waiting for the next one. There is no boring terrain in geology.

nicely explained. You don't talk down to your viewers -- thank you!

Excellent overview. This series will make a great addition to The Earth Science Online Video Database!

I really love this series. Thank you so much for putting it together!

This is a phenomenal amount of info, wonderfully presented. Thank you for this!

Great video!

well done

First off I want to say that the star real helps. But I have some questions about the passive margin that is created with the initial breakup of Rodinia. The map style changes after that and a bunch of time is skipped so I am just trying to make sense of what is taught about happens to that ocean crust that is being created between Laurentia (where the star is) the Australian and East Antarctica plates. It seems like it is very similar to the mid Atlantic riff. So if that’s the case than a passive margin, transitioning from the continental crust of Laurentia to the oceanic crust to its west should still be there. And a fairly significant chunk of oceanic plate at that. Here’s my issue, I’ve always had an issue with the breakup of Pangea, especially on the west coast, having to deal with the Faralon plate subducting right away. It just seems like it’s an additional variable that would keep Pangea together. Having a passive margin off the west coast of Pangea, with westward subduction, would add slab pull as a variable to help tear Pangea apart. There is a bunch of tomography research to support this idea too. Looking under the west coast the Faralon plate is just not there in its current place. The work of Karin Sigloch actually seems to show that the Faralon, which in her work is actually the extended oceanic crust from the passive margin of west coast Pangea. I know the traditional model teaches that Pangea separated and subduction of an oceanic crust began right away, but like I said the Tomograpghy of subducted plates seems to suggest the old model doesn’t really work anymore. I guess I’m just wondering your thoughts. I love detail you go into in this series. Actually showing locations that highlight the different processes over the millions of years of tectonic activity. Sorry if this was long.

this is pretty good...

Ken-elly-uh, not Kwes-nelly-uh. But, as others have said, a succint overview of a very complex process.

What is the blank terrain between the "accreted" Siletz Terrane and the Terranes to the East? Why does the Siletz Terrane even have an "identified" Eastern margin if the quaternary deposits and sills hide what could extend underneath? Could the Cretaceous Columbia Embayment floor (that the Cascade Range and Columbia Basalt Group hide spectacularly well) be obducted oceanic terrain that the Siletz Terrane accreted to?