‘Nick From Home’ Livestream #55 - Pacific Northwest Tectonics

[@michaelnancyamsden7410]

Back for review. Love your cat. Love your teaching methods. Especially enjoy your field trips like the Grand Coulee Dam.

[@JenniferLupine]

👏👏👏Great animations! Enjoying the cozy fort ... 😊😊

[@arlahunt4240]

Today is Monday. I discovered you at home yesterday. Good to see you .

[@smithcon]

Was really looking forward this. I was NOT disappointed. Very thought-provoking and informative as always!

[@jameshughes8745]

Well done. I am working my way through the live streams and enjoying this in 2021.

[@erfquake1]

Terrific!! Kudos to Nick Zentner for top-notch geosplaining & Jenda Johnson for fantastic animation work!

[@Valkyrie801]

Thank You Professor Zentner. I now have a better understanding of the dynamics of the plate tectonics, and volcanism here in the Pacific Northwest.

[@lindaboiteux1758]

RE: Challis magmas Followng 101, I began listening to 351 a while ago, & decided that I was in over my head. So, I started the "Nick from home" series. When I hit confusion, I dove into the 4 (351) lectures on the Challis magmas. Much improved comprehension now. Thanks AGAIN!

[@tomwestbrook]

This is fascinating. Thanks for all the hard work! The whole idea of subducting spreading plates is a mind-bender.

[@SCW1060]

This is my favorite video so far and I'm all upto date

[@adampryor1289]

Missed the livestream today to go rockhounding! Thankful for the replay and for you Nick!

[@hilmaallen1302]

I so enjoyed watching your lectures although I cannot watch them live because of work commitments, as I’m a frontline staff here in London 🇬🇧 Uk. But I just wanted to tell you that I thoroughly enjoyed them all, so thank you.

[@janethouckanderson265]

Hello from Ridgefield, Washington.

[@lindaboiteux1758]

Hi Nick, You gave interesting comments all around "Challis magmas", but you missed the definition. Please define Challis magmas". Thanks.

[@harrietharlow9929]

I'm a major geology fan and I can't thank you enough for this lecture! I had never heard is the Idaho Arc or the Challis Magma, so thanks for that info--you really have fleshed things out for me. Love this series!

[@Kristopherf1]

Nick, one wonders what happened that makes you remind us all so often "I'm not flipping you off..."

[@swearenginlawanda]

Good question

[@barbaraburkhardt3047]

Lol... the 12 minute warm up...I needed to know more about whats under the Mariana Island and a site on Guam.. . 2 older youtube videos did the trick... now I am hooked streaming.

[@darcyturnbo4724]

Love these videos! I’m in Salem, Oregon.

[@danduzenski3597]

Canyon Drive and North Shore Rd. South Kitsap Peninsula. Chunk of Something uplifting, while all land south of the Hood Canal will subside. Big elevation change at the summit of Canyon Drive. What’s going on at the Hood Canal Hook?

[@richardmourdock2719]

Nick, your most complex and BEST video of the lockdown! Fabulous, mind-stretching exercise and demonstrated very well with the methodology of showing how you were communicating your ideas to the "animator" geologist. And another reference to Noraly! Wonder if you could have her involved with this topic given her background as a minerals exploration geologist.... I'm sure she'd make it interesting and challenging from her ideas. And who knows, she might even end it all with "geeve us a beeeg thumbs up" and result in a few thousand more subscribers! Seriously, I love the way you teach the science that gave me a great, great career before retiring...

[@maggies5049]

Richard Mourdock I absolutely agree. Best so far

[@1234j]

Wonderful! Puffing in after family duties didn't allow live view, from Hereford in England. Cheers from Jane

[@hallierug]

Question on using the Absaroka range (MT) for part of the ID arc vs the Beartooth Plateau which is the basement CRATON Archean rock.

[@christophercarr5865]

About the arc gap question -- if I understand what the questioner was talking about, there is a gap between the southern segment of the Ancestral Cascades, and the rest of it to the north. I believe it's proposed to be a slab tear -- between Shasta and Lassen.

[@malcolmanon4762]

Why isn't the pacific plate subducting underneath California, yet the JdF plate is sinking beneath the NW US? I've just recently found your channel, after looking up some geology for the formation of the Lake District in the NW of England, and I think you are a great teacher!

[@johnnash5118]

Because California is oriented @WNW-ESE, is further East than the PNW and has over-ridden the Farallon spreading ridge over the mantle upwelling source @20-25 MA, thus placing it on the WNW moving Pacific plate side of the mantle upwelling, which is still divergently active despite being under the continent. The spreading ridge has offsets, each in direct contact with 6-7 equally sized segments (called Terranes,) all oriented toward the WNW through California and each separated by WNW oriented Strike-Slip Transform Faults- the same system normally seen in Oceanic plate systems. A mantle offset segment is even moving the entire Sierra Nevada Range WNW. Earthquakes occur because the Terranes have roughly defined margins, are moving at differing speeds and varying rates, creating friction and quick release of tension. By contrast, the PNW has not yet over-ridden its Juan De Fuca-Farallon spreading ridge, and because it’s not oriented WNW like California, but more toward the NNW, it’s in an oblique conflict with the ESE moving JDF-Farallon plate, this causes an oblique collision, resulting in subduction of the denser JDF-Farallon plate under NA.

[@malcolmanon4762]

@@johnnash5118 Wow, thank you for the informative reply, most appreciated.

[@AvanaVana]

To add to what you were saying about a Kula remnant - there's some papers that examine the idea that the Yakutat block, which is currently docking to Alaska, right at the 'bend' or 'embayment' along Alaska's southern coast, is actually the other half of Siletzia, the half formed on the Kula plate! So the current "Alaska embayment", with Yakutat docking to it, would be equivalent to the "Columbia embayment" of 55 Ma. Another complication is that you get these kind of 'slab window' magmas up in B.C., all the way up to the Yukon territory, just like the Challis episode. So there are workers who believe there was not just a Kula-Farallon ridge, but north of that, there was another Kula-Resurrection ridge (the Resurrection Plate being another plate, or one that was once contiguous with the Kula). Currently I think the biggest 'mystery' is the existence of voluminous (and active!) non-subduction related volcanism in the interior of B.C. (ex. Mount Edziza, Edgecumbe, and many others). Some of these seem to be related to a hot spot, but for others there is absolutely no trace of such a hotspot and they are widely scattered and seem to be related more to extension, and in the case of volcanism on the B.C. and SE Alaskan coast (Edgecumbe, Haida Gwaii volcanic plugs), transtension along the Queen charlotte fault.

[@Uachtar]

Hey Nick, Thanks for doing this, Always very interesting. Keep going ! :)

[@helenel4126]

How does the Kula Plate break? Why does it break? What makes it break? Maybe these are all the same question; I don't know. I'm still trying to get my head around the idea that the North American plate is rotating.

[@johnnash5118]

Put the east Coast back together with Europe and Africa over the center of the Atlantic Ocean Mid-Ocean Ridge. Now move them away from each other, but slowly turn North America counter clockwise so that the East Coast moves toward the NW and the West Coast toward the ESE. That’s Continental rotation.

[@danduzenski3597]

No wonder the Hood Canal Hook is my favorite geological feature. Grind,slide and now crescent basalt. Add clockwise rotation, wow.

[@wonderspazz3333]

Hi Nick I would like to say thank you for allowing all of us to hang out in your backyard and learn with you. I'm wondering if you have seen anything about the star in a jar experiments on you tube, and if that has shape your thoughts on Earth making processes? Thanks again from Richland wa.

[@jeromekay2106]

Nick, DID THE SUBDUCTION OF THE SPREADING RIDGE BETWEEN THE KULA AND FARALON PLATES ACCOUNT FOR THE YELLOWSTONE HOTSPOT?

[@PiersStudio]

Thanks for showing my rough video idea. It was great being a part of the “pre-show” before the real ones.

[@KathyWilliamsDevries]

It was awesome! Loved your Muffler Boy reference

[@PiersStudio]

Kathy Williams-Devries thanks! It was fun to include the NZ idiosyncrasies in that.

[@michaelnancyamsden7410]

Here in 2022. Very interesting. Beautiful cat!

[@danielirvin4420]

Had to jilt you this morning for the Dragon-ISS docking, settling in now to watch. Lived 17 years in BC and would be very interested in that as a topic. And if you really stretch your wings and do Nova Scotia, I'll be sure to catch that one live. : )

[@michaelsteffen4887]

I loved it when Nick flipped of the Muffler Boy! LOL

[@christopherantonsen7896]

I live on the eastern side of the southern tip of the Sierras (think Mojave Desert). We have scattered about large bolders, sitting atop of the sand (gravel, whatever). Where the heck did they come from? How the heck did they get there? I would say glacial erratics, yet this side of the Sierras (unlike Kings Canyon or Yosemite) show (to my eyes) little to no glacial carving. Just large stones where no logic that I can see could put them there. Miles and miles from the feet of the canyons (sharp "V" shaped canyons, not apparently glacially carved). It seems unlikely that they tumbled down the slopes (steep though they are) and rolled several miles across slightly sloping terrain. Any ideas?

[@christopherantonsen7896]

Historically, when it rained on this side of the Sierras, the Owens river flowed down this side of the mountains and formed a lake, China Lake to be exact, which drained into the lake bed near Trona and thence (circuitously) into Lake Manley in Death Valley. No pun intended, but that was pretty much a dead end. I know about down, but I'm somewhat confused about what's up with these boulders. They ain't your small decorative driveway stones. They're several (10?) tons in size.

[@KozmykJ]

Yup I was wondering from early on WHAT THE PLUME OR PLUMES WERE DOING AND WHERE THEY WERE DOING IT WHILE THE PLATES WERE DOING ALL THAT DANCING ABOVE. Another QUESTION arose - ARE ALL THE KNOWN PLUMES STATIONARY AND CAN NEW ONES APPEAR WHILE OTHERS SUBSIDE ?

[@catherinegiese3205]

I know I am late on this... couple years... But I listen to your lectures while working..... Sometimes I put things together, and maybe you touched on this in a different lecture. But the animation that shows the spreading ridge subducting under the pacific plate...... Could that be related to the Oregon hot spot trail in your lecture about Oregon? That is not related to the Yellowstone hot spot?

[@marlindaatkinson5265]

Thank you, the new normal has just gotten a whole lot better sciences live brainstorming

[@jamesmoy8665]

Hi Nick. Love your videos. I'm from Dorset UK so have to watch after the event but really look forward to finding your new videos. You have mentioned on several videos how everything is pivoting around a fixed "centre if the universe" point. Is it possible that a slab of Kula (or another) plate is hanging down to the mantle and acting like an anchor or sail thus creating the pivoting action?

[@gerardostheimer43]

The Kula - Farallon - Pacific triple junction looks like the "back to the future" Flux Capacitor.

[@charlesstreet5030]

Nick, you're weird but I love you. Staring at the camera for almost a minute before you turn the live off. 😆

[@alanfrye5237]

Siletzia being a more continental type of igneous rock created above sea level would be lighter, less dense rock. Thus it would float and not subduct with the Kula plate. The lack of the push from the plate to the west would than strand the plate subducting causing it to break. Makes sense to me.

[@jamesdownard1510]

@1:26:00 wow, I've driven Hurricane Ridge windy road, so that's a chunk of Siletzia, neat!

[@alicegriffin402]

When did the rotation begin, and in relation to the subduction of the spreading plate?

[@williammontgrain6544]

Are there more Challis Magmas further south? I suspect so. If so, might they be part of the reason for the gold deposits in NE Nevada and E California?

[@sherrylhenning5630]

QUESTION: Is the rotation where you're at caused by interference with movement of Juan de Fuca plate by the Gordo plate? (a small plate at the S. end of Juan de Fuca)

[@catherineclark6284]

Love that glass fll of rocks!

[@RICDirector]

oooh, man, you stretched my brain but good!! I'm so glad you took the time for this one....it needs it. So...is the hotspot under Yellowstone on the expansion ridge, then? At a junction of spreading ridges, perhaps?

[@bmorecareful3723]

I would love to be a student in one of his classes he makes this all so interesting

[@victorpearson1418]

Could this explain gold fields in other parts of the world , as caused by breaks in the subduction zone ?

[@Yaxchilan]

Siletzia for the win!!!!

[@Poppageno]

Nick, That was awesome! It really put the process into a timeline perspective. Hadn't heard of the slabs, looking forward to more on that. COULD A HANGING SLAB BREAK,/CRACK BE THE FOCUS POINT FOR THE YELLOWSTONE HOT SPOT? I mean if it is just hanging there in the astenosphere... Thinking of Baja-BC moving north with dinosaurs on it 85 to 65 Ma. CAN THE MAGNETIC FINGER PRINT OF SILETZIA DETERMINE IT'S LOCATION OF ORIGIN? Thanks again, stellar work! gene

[@jamesdownard1510]

I think the trick in 3D visualization will be to show the landscape from above, as your drawings do, but with a color-keying subterranean view (the way caves are depicted in modern graphics), and have a moving vantage to shift perspective to highlight the salient collision points and their impact on the landscape above.

[@lindaboiteux1758]

P.S. I was still born 78 Ma. (LTB)

[@KathyWilliamsDevries]

Rewatching the first portion of the lecture as was too busy with the Monty Python quotes in the livechat.

[@UpcycleElectronics]

Hey, If you want to recruit more people to Baja-BC, perhaps it would be beneficial to break down the actual distances traveled in centimeters per year. I thought Baja-BC sounded outlandish at first when I first heard it on your CWU lecture. I broke it down and posted my math in a comment on there. As I recall it comes down to around 4cm per year. If I recall correctly it is within a few millimeters per year of how fast the San Andreas fault is moving now. When viewed from this angle the story is far more believable. Intuitively, the consequences of this kind of change really throw a wrench in a lot of stories though. Like how does this scale of change mesh with how the continents appear to fit together from the breakup of Pangaea? Is western North America some kind of global outlier. If so, why?

[@freeheelvegan4878]

What was with the winking about the weather on Wednesday for the Wenatchee talk? Is your friend from Malaga coming to pick you up?

[@erikk77]

Siletzia is a new pizza made of Mt. Saint Helens ash and Hawaiian lava.

[@kevins8434]

"Oh no she di'int!!" in relation to the counter-clockwise rotation of W Or n Wa... Awesome!!

[@KVM-rf5ig]

QUESTION: WOULD THERE ANY SEISMIC ACTIVITY WHEN THESE PLATES BREAK, OR ARE TOO DEEP?

[@mytech6779]

Too slow and not mechanically connected to the crust above in a way that builds stress and suddenly slips. The volcanic activity that results has seismic activity but that would be an indirect effect of the plate break.

[@lauram9478]

❤

[@bagoquarks]

*SUBTITLE:* All science has a first draft at some point. Please keep those animations coming! ~~~~~~~~~~~~~~~~~~~~~~~~~~~ Tuesday's live stream is "British Columbia Geology" so we clearly need the inspiration of some of our favorite Canadian singer/song writers. So there is ... ... *HOMEWORK:* Canadian geography, element number 6 on the periodic table, and the concept of time - courtesy of Gordon Lightfoot, Joni Mitchell, and Neil Young. Lightfoot, "Canadian Railroad Trilogy": kzbin.info/www/bejne/hJvShmSHoMqcsNU - Gaspé (Peninsula) - Saint Lawrence (river and gulf) - muskeg, not a place but a thing - Canadian peat bog - the railroad, The Canadian Pacific RR, tied British Columbia to the Eastern Provinces, a transcontinental achievement - "when the green dark forest was too silent to be real", time reference and probably a line every songwriter wishes they wrote Mitchell, "Woodstock": kzbin.info/www/bejne/mYPNgnasm8iLpJI - spoiler, there is a *HUGE* difference from the CSNY version - "billion year old carbon" - stars fuse hydrogen (H, 1) into helium (He, 2), then fuse helium into carbon (C, 6) - "stardust" - stellar explosions scatter valuable fused elements like carbon across the universe - carbon becomes a key ingredient in the carbohydrates found in poutine, a popular item on Canadian fast food menus - by default, Joni is our favorite Canadian astrophysicist Young, "Long May You Run": kzbin.info/www/bejne/jYrRkmCLdtlqa8U - reference to a favorite old car, lots of chrome on it, chromium (Cr, 24) - metaphor for human longevity when the geology we know is at least 4.6 billion years old?

[@gerardostheimer43]

BAJA - BC: Are you suggesting that the spreading drove the movement of the Mt. Stuart chunk of crust? Or there was another mechanism of moving that chunk?

[@amyself6678]

W ocean spread plates it can zig so part is under Continent so it moves land , like San Andreas starting at Baja to SanFran is moving N slice of CA.

[@UpcycleElectronics]

23:00 "Jenda Johnson" kzbin.info

[@mcelveen22]

thanks for easy access!

[@gitman65]

Interesting as f♤♤♤Nick great one.

[@jimhershey542]

Shouldn't there be mega-quakes associated with these breaks in the plate with resultant evidence that would support this idea?

[@barneymiller6204]

Muffler Boy was great! LOL

[@Hartcore11]

Zama, Japan

[@sherrylhenning5630]

In California, its always San Andreas Fault! ( that groaner of a joke is older than me!)

[@ronlarson6530]

I am one of those "Gold People" :)

[@nathanokun8801]

What a mess! Half-a-dozen different things got slammed into one-another (literally!) over a rather narrow timeline, each causing a different result on top of one region in area and one narrow step-by-step timeline. Now THIS is geology!!

[@jcadult101]

18:20, does anyone else get the impression Nick likes pepperoni pizza?

[@sprucy434]

1:35:01 Hi kitty!!!!!! :D :D :D

[@TheWestisBig]

Just watched #55- great stuff (watched many hours of your stuff in total) I make videos about the West. I'm looking forward to your Native American Geology talk next week. I've been to the area many times and produced a 90 min doc on Four Corners area, as well as several others on unique features there. kzbin.info/www/bejne/oaXdn3mFnKmEmM0 BTW- you can use the drone footage in one of your talks. Also, I have lots of footage of the southwest. That is a link to me Ship Rock video. It has drone footage and a geology section based on my own amateur research. If you have the time, I'd love to know if I got it right. More recently I've read a couple of books by Blakey and Ranney- to help future videos. BTW- I know Glacier NP played a role in your career choice- it's my Fave park (and I've been to most of them) my 93min doc, "Glacier: The Hiker's National Park" on the park has been seen by about 900,000 in the past year- people seem to like it- you might as well. I'm in the process of updating the climate change and stromatolite sections (8 yrs old). I've read Wash St.'s E. Kirsten Peters book to inform the writing. I'm thinking about adding a more detailed segment about the Park's improbable geology, from its early location and stromatolite home to accretion, to the reasons for different rock colors, to the over thrust belt and of course the glaciation cycles. Would love some help.

[@virgilviereck9307]

Ferndale Washington

[@dhouyt]

Thank you Nick. I would watch you if your shows were about tiddly winks. I am nothing. I am a no-ologist. The earth GROWS! Proof. Watch the moons of Jupiter and Saturn. Did you watch the Scarlett Johansson movie, "The Island", and the guy trying to figure out the formula for the lottery. That is plate tectonics pure and simple.

[@etherealvoices5368]

I can’t believe so many people who claim to be fans of Nick can be so disrespectful to run a Python chatroom in the livechat while he is trying to teach. Childish.

[@garymingy8671]

Kitty -o- de loom? Tip: make green jello " float " beans peas an carrot s crinkle cut...slap it with an axe to simulate earthquake s...freakish shallow magmas...not a bad band name. Press on comrade.!. Nostrovia

[@slowcheet]

Found fallen angels🐉 and morning star Aztec dragon Vehicles of the Gods .. Star clusters, fallen angels, stone dragons, mountains, landmass, en.wikipedia.org/wiki/War_in_Heaven

[@slowcheet]

gnosis.org/naghamm/gosthom.html kzbin.info/www/bejne/gpTbaH2iecqchM0

[@slowcheet]

You got google maps do some research on landmass

[@OlgaAlyce]

Just joining! Hi and bye? 😆