Reseach Documentary - "The Mystery of Melange"

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[@Jay-zq8st]

Like this video if you want more of this type of content!

[@HeadachesAreGreat101]

Love this video and Paradyme! More geology content!

[@jensoboleski]

Another question: You said the Skaggs Spring Schist was one of the first rocks to accrete to the NA plate in Northern CA? I'm confused by this. Like... how did that work? How do we know that? What was it riding on that made it accrete, and how was it at the front, so that it accreted first?

[@jensoboleski]

Fun fact: After watching this video, youtube's algorithms sent me down a Robert Stern rabbit hole, and having watched several videos of his talks over the past couple weeks, I'm now beginning to form a rudimentary understanding of subduction initiation & melange mixing mechanisms. It's fascinating! Love the sentiment that everyone's a nerd about something!

[@jensoboleski]

Wait, you're also (lemme see if I got this right) "tracking lineation"? So you can "measure the obliquity of subduction"? Man, that sounds cool. I didn't know you could determine that. Now I wanna know how that data turns out as well.

[@jensoboleski]

Wow, this research sounds really cool. I wanna know how melange gets mixed too! (in layman's terms of course... I'm not a geologist.) When will it be published? I like the tectonic explanation better than the sedimentary explanation. Of course, I have exactly zero credentials to have an opinion one way or the other, but that's the one that makes more sense to me. I'll be interested to see what your petrography studies show.

[@Jay-zq8st]

This Jay from Paradyme. I love all of your questions. They're all so good! Stay tuned, potentially a follow up video coming...

[@Jay-zq8st]

May I ask, how did you find this video? I'm genuinely grateful for your view and would love to know how I can reach more people just like you.

[@jensoboleski]

@@Jay-zq8st The question of melange mixing dovetails nicely with several recent videos that Nick Zentner posted on his UA-cam channel, in which he interviewed prominent geologists, (i.e. Bob Miller at SJSU who has done the most work at the Rimrock Lake Inlier in the Cascade mtns of WA, which, as it happens, is apparently a melange). He was asking them questions about the when, where, why & how of melange mixing, which I totally found tantalizing, but it seemed to me as if none of them were able to really answer, as if maybe we don't really have a robust answer out there in the literature. So now my appetite is whetted to understand more about melange mixing, when lo and behold someone posted your video. I watched it like 5x to try and understand what what was being said & studied.

[@jensoboleski]

@@Jay-zq8st I was also hooked on this video due to feeling a personal connection to the area shown. Our family has an annual trip that takes us thru Cloverdale every year from 101, up Hwy 128 to the coast; and I'm always staring out the window at every rock outcrop we pass and wondering what type of rock it is. This video sort of answers some of those questions for me, but also leaves me wanting to know more about what were the higher grade rocks that were encountered.

[@jensoboleski]

So the Skaggs Spring Schist is the matrix? And it's been dated at 132-144? But it's got blocks of higher grade rocks in it that are older & believed to date back to the beginning of subduction? How do they know it's from the beginning of subduction? In addition to the schist, what other rock types are in the area you're studying? Which rock types are the high-grade ones that you were saying don't belong there? You said there's a metavolcanic rock beneath the schist? What rock type is that? (is it serpentinite?) (Sorry for all the questions, I'm just trying to wrap my amateur's brain around this video.)

[@ParadymeBrand]

Hey @jensoboleski , Jay from Paradyme here. I hope you're having a great day so far! Question for ya: If I made a video answering your questions and a part 2 to this video, would you tune in? I can dive further into: structure of a subduction complex, how subduction complexes are formed, what a melange is (and what it is not), the theories of how mélanges are formed, my results on oblique subduction, and overall architecture of the northern CA coast range mountains, and much more!
I'd love to share this passion with you and any others who are interested. Let me know! I'm grateful for your interest!

[@jensoboleski]

​@@ParadymeBrand Ha, a silly question! Of course I would watch a follow-up video about the outcomes of this research project. I'll be waiting on pins and needles for it to drop. LOL.
And I'd be sure to share it in the same place where I saw this first one. Speaking of where I saw this, I promise, I do keep trying to answer your question about how I came across this video, and for some reason that comment keeps disappearing. Not sure why all my other comments are fine except for that one. Dunno if I'm running afoul of some UA-cam comment algorithms, but if mentioning another platform is the problem then I'll just say this video was shared in a fan page for another geologist on social media. If you're looking to share the passion with others who are interested, then that fan group is a good place. I'm sure that many folks there would want to watch a follow-up video, especially folks like me who live in Northern CA. We're always pining for more geology videos about places closer to where we live.

[@jensoboleski]

I didn't fully understand what is meant by "structural top" of the Franciscan complex? Does that mean it's at the top of the down-going plate? If it's at the top, then why do you also say those rocks got buried the deepest and subjected to the highest temps & pressures? How could they have been the deepest rocks if they were at the top of the plate?