Older Glaciations at Tacoma Narrows w/ Kathy Troost
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- čas přidán 8. 07. 2024
- CWU's Nick Zentner learns from UW's Kathy Troost near the Tacoma Narrows Bridge in Puget Sound, Washington. Double Bluff till (Marine Isotope Stage 6) is featured.
Trailhead parking: maps.app.goo.gl/Umb3Yo6M3Prmp...
This is one of the best videos. Thanks for bringing Kathy on board she is a good teacher with all her enthusiasm. She’s got a way of making explanations understandable.
Agree! Kathi is indeed a great communicator. Really enjoyed the hike and lesson!
The professional geologist community is a wonderful group.
I wonder if it is because there is a significant tradition of (scientific) disagreement/critique which results in absolute wonder and constant re-evaluation. I work in Computer Science, and it is really bitchy! :)
The problem was there was no wonder or re-evaluation till now. Nick is still a little pig headed and not willing to go against the dogma@@rabidbigdog
Dang it Nick! You keep coming up with fascinating guest geologist that are great. Her work has helped fill in the work of the old guys and pushed our knowledge of ice ages and North American landscapes forward. Thank you Kathy. Your so fun, cool, and smart!!!!
Glacial tectonics? What a joy to observe Cathy Troost in full teacher mode. Learning new stuff right through this video . Clearing up old misconceptions and naming in an area that has been long examined. Great!! 🐻
Wow! Kathy is an amazing educator, able to really convey the complexities of these multiple glaciations in a way that we can really relate to. Well done! I feel like I have a much better grasp in what was going on in the last ice age over on the coast, as well as how modern geologists figure it all out. And how amazing was Bretz to have figured out so much over 100 years ago without the benefit of all our modern technology developments? It is easier to see now why Bretz was so fixated on the Eastern Washington flooding having a northern origin. I would still like to see a paper on origins of erratics along the upper Columbia LOL, especially around Wenatchee. I do not think it is out of the question that we have erratics from the Cascades. Thanks Nick for another amazing video.
This episode, IMHO, has been the most interesting of the glaciation deposits series. Kathy is walking encyclopedia in her field. I was throughly impressed by her demeanor, personality, & her knowledge. I agree with you Nick, "Job well done!" 👍👍👍
Great to again have another Geologist on camera sharing their expertise
I have taken my kayak down under the Narrows Bridge and by Point Evans a number of times, chasing fish. I now have a much greater appreciation of the beautiful exposure she calls Double Bluff! I have also hauled home several kayak loads of cool rocks washed out of the tills onto the very spot they sat looking at the old till...
Really enjoyed the knowledge Kathy is able to share here. She is well-spoken and breaks down descriptions as a skilled educator should. And…I’m really, really, really jealous of her 1951 entrenching tool (shovel)!
Kathy rocks! One of the most interesting personalities you’ve had on your videos.
The Port Washington Narrows is a tidal strait located in Bremerton, Littlerock is 11 miles southwest of Olympia. This was so fascinating. When I was a kid and I saw the bluffs on Whidbey (we went to Mukilteo beach a lot) and the bluffs on Hat (Gedney) Islands, I knew they were due to glaciation but I never knew any of this. So fascinating, Nick. Thanks to both of you for a fascinating field trip.
That was just a master class of information Nick & Kathy! I can see more clearly the amazing construct of the glaciation periods and where the BC interconnection is. I remember growing up and seeing some of the Pink / Reddish granite-like rocks further up north along the coast and inland in Whatcom, Skagit counties hills and mountains. Again, a stellar job.
Great video Nick. Kathy's work, both with Derek Booth and solo has greatly aided in my understanding of Puget Sound glacial history.
Hey Nick, your videos are amazing and have encouraged me to read more geology. Now everywhere I go I look for geologic remains and then search the internet to confirm. Thanks for introducing this field to me.
My mind is having some success entertaining all these glaciations speeded up a billion times. Thank you both a million times.
As a consulting geotechnical engineer with a background (bachelors) in geology, I greatly appreciate this series of lectures and field visits! Keep up the great work!
That's for giving credit to those experts that enhance your teaching experiences to us lesser mortals that want to learn about geology. I have three degrees (two technical AS degrees and one BS Education degree) and not one is related to earth sciences. So, at 65 years old I'm willing to learn something new. PS. I love geology. Your CZcams videos as well those from other experts in geology, to include volcanoes and earthquakes, is fascinating for a retiree from modern technology (Electronics, Avionics, Radars, and Electronic Warfare). My first introduction to Washington State Earth Sciences was in 2007 during a PBS program (while I was visiting Seattle) on the theories and evidence behind the 1700 Cascadia Mega quake. Since that program I've been fascinated by the geology in the Northwest US.
Thanks again for today's lesson on regional geology. You and your guests are making my frequent treks thru Washington very interesting.
Oh man Nick..trying to digest this one. Right in my backyard so to speak. Thankyou for your ongoing quest for quality geological documentation and your incredible tool box of colleagues willing to contribute their knowledge. What a treasure.
Puget Sound is a geological wonderland
Tacoma narrows geologic explanation & paleomag sorting helps ice sheet advances w/age
My childhood playground. I will watch twice.
I used to walk along there in 1966, stationed at McCord, but living close to the bridge, and wondered about all the different stuff making up the banks. Now I know a little more, but am in East Texas and can't walk it again. Thanks for the fun.
Well consider me glacially thrilled 😁 another field trip with Prof Nick. Whoo hoo 😊
Gig Harbor is my hometown and I have friends who live near the trail you took to get down to the beach.
I lived on the other side of the Gig Harbor peninsula by Horsehead Bay. I love learning about how this region formed. Keep up the good work.
Kathy seems very knowledgeable and interesting to say the least. Would love to see her as a guest on one of your a to z lectures.
Kathy is the best!! And the smartest! Great one, Nick!
What a treat, she is fantastic! I have to say, growing up in Seattle with just a popular view of its underlying geology, I always felt a bit inferior living where somebody just backed up a giant dump truck, with only the occasional tusk or hunk of smashed wood poking out for interest, but she can read our layers like the Grand Canyon.
What can I say other than 'cool'! Thanks Kathy and Nick.
Nice to see Kathy! She wrote a nice memorial for my father, fellow geophysicist Marvin Ehrlich, back in 1993.
I lived for a time back in the early 70's at Salmon Beach on Point Defiance. It was/is a community(and site of an old First Persons village) built on pilings at the foot of the described deposits. I used to climb the loose nearly sheer bluffs on both sides of the Narrows Bridge(old one) with nose to all the different deposit layers and was left with many questions as to what they represented... Thanks for this post Nick & Cathy as 50-year old questions are now mostly answered.
1000m (!) of ice is an enormous amount of weight. Magic, both. Thank you.
So great. Kathy is wonderful and you made the convo sail. Loved it. Thank you
Nick, being this is a place I have walked from time to time over the years, now I will pay more attention to these details whenever I see one of these exposed areas. Thanks for another great presentation! Hugh in Puyallup
Thank you Kathy and NIck. Yes Kathy, you are inspirational!
So fun to hear excitement in learning about the earth.
We came here from the southwest region and so fascinated with ALL of this. First stumble on Nick from a UW lecture about cascade megathrust fault. And I'm not even into this stuff 😮. This is my 4th video binging 😂👍 and I love it 💪
Thank you both
Wow who knew. there was so much to see and wonder about in Tacoma! that was great. What a nice day, to just even imagine the amount of ice long ago on top of the lady and in that quanity what happens when it melts. and that rocks could be transplanted all the way from canada, What a terrific episode. will probably watch it again.
i live in southern arizona but u make it feel like i'm there everytime
😊 This is truly amazing. My mind is well blown. As the first video, after deciding to branch out in expanding my glaciation locations, this is a perfect start. It also expands on my Tacoma Narrows life experiences. It's also my introduction to western Washington glaciation knowledge. As a teenager in Seattle, I knew there had been glaciers. I knew that city had cut down the size of some of the hills. Otherwise, I really didn't care. I was busy growing up from 62 to 67 when I went away to college in E'burg (Ellensburg to most people). Yes, a major part of my life has centered around CWU. I was a sophomore when it changed from CWSC to CWU. The consistent thing through my has been and continues to be learning. I found this video today really fascinating. Thank you to Nick and Kathy Troost.
OMG 😮 so much information packed into an hour. Terrific work!
Yet another hit! thank you Kathy Troost, good job, and Nick too. stay safe ALL!
I live just above these bluffs. So interesting. Thank you
Boy, oh boy! This is like being in a candy shop. Everywhere you look there's more goodies to find! And when you think you know what you see, there's Kathy to point out some new mind boggling details!
Thank you Nick and Kathy!
Thank you Nick and Kathy. Very interesting and beatific place. We really enjoyed this show.
Thanks Thanks Thanks I just got back from my grandkids home in Gig Harbor and walk the long sum of the stuff you show so enlightening thank you
Another Great, Educational & Interesting Video Nick Zentner.
Thank you Nick and Kathy. My mind is also blown. So happy you came to my neck of Washington. I always thought that the clay banks over in Point Defiance park was formed from a pooling of Gracial Waters.
An analogy of Puget Glaciation and Eastern Washington glaciation is too much to wish for, Nike. It's a thought experiment to find similarities, but there are so many variables unique to each glacial region that anything more specific than generalities could be made. That there is debate about subglacial water behavior is fascinating.
What would ocean levels globally during periods of glaciation have on the Puget sound area?
Glacier till fills previous low areas much like lava flows in Columbia Basin where they filled river valleys and are cliffs we see today. These till fills become the cliffs along lower, current waterways. Timeline discussions were very instructional.
Wow! Kathy is awesome! Great information!!
...great stuff Nick...I was first fascinated with your Liberty lectures back when I was retailing gold prospecting equipment...last year I was lucky enough to holiday from Australia to the U.S. west coast.I spent nearly 4 weeks walking this beach from the Narrows up to Tides Tavern and you guys have answered A LOT of questions! Love Ya Work..👍
Love the B.C. connection as always ♥
Thank you, Kathy and Nick.
This is wonderful dear KATHY, and nick!!!! Thank you, deeply!!! Yes, again--- we learn SO MUCH from you and all the guest❤❤❤...
Vashon Island was owned by one man back in thr 1930s.
My grandfather was working up here one summer. The owner of Vashon Island offered to sell it to Grandpa for ten cents an acre.
Grandpa laughed, "What would I do with an island? My wife and children are in Salt Lake City and I plan to go home when this job is done."
He told me this back in 1963. I had lived in Seattle in 1959-60 before we moved to Idaho. 😊
Wow! Thanks Kathy and Nick!
Thank you-I’d never considered that surface is unaltered as in this location and with Skye Cooley and Bruce Bjornstad! Continued astonishing professional geology!
Now, I finally know where the pink granites are from! Growing up in Skyway (South Seattle) I would find that stuff in the neighborhood, but was never able to find a pink granite cliff. Not the kind of thing that bothers me now, but it was a real head scratcher for me when I was about 10, and already passionate about rocks.
It never ceases to amaze me the all-around legend Bailey Willis was. From glaciers to coal(although not as much 😂) to Mt. Rainier.
Great video as always
Should have someone come out to Black Diamond.. We've got some weird spots between known glacial deposits and the 10,000 feet of sandstone..
Very interesting, and another voice/view always adds to the experience for a non-geologist. Thanks!
Years ago I saw similar at Port Townsend and Oak Harbor. I wondered what on earth had caused it. At the time I imagined some horrendous disaster. 20 years later I finally understand :-) Well Done!
Thank you Nick! Thank you Kathy!
This is great information on till. Hope it will help me with Alpine Glacier and Valcanic Flows in Colorado.
Thank you so much for this field trip. Video imagery is so helpful for myself in helping to identify deposits around the Sechelt Penninsula.
There appears to be a history of a large flood or a glacial lake ice dam failure where I live.
Thanks for these vids! I live and work all over Puget sound and am fascinated by all the geological things here. I've discovered some cool places to visit from your videos too!
Excellent Q & A's! And to see the visual from your podcast (fast turnaround 👌🏼). Just fascinating, educational, and fun! (The interglacial periods are certainly important...including volcanic, etc. clasts) Plus, the processes that carve deep troughs! Just wow. What a great picture you and Kathy have given us. And questions. Always questions.
Glacial Till! You gotta love it!
Dr Troost is fantastic!!
I agree, what a treat! I grew up along the beach in the Minter Creek to Glen Cove area. Saw so much of this in the layers of the local beach cliffs. Curiosity about these deposits started a lifetime interest in the geology of this area, the PNW, and beyond. Thank you so much for this video Nick, and thank you Kathy for your studies of these deposits. So many questions from my younger days are answered here!
Thank you! I loved every minute.
This was excellent! I sure learned a lot about till, and glacier advances in this area!
Wonderful episode!!! Thank you Nick and Kathy. I hope your sandwich was terrific. I am sure you both had a terrific discussion.
Wow. Great presentation! Sure brings the charts and explanations to life! The enthusiasm is contagious!
Thanks for pointing out the seals, too!
Kathy presents so well! So on top of her game. Love it!
Hy Kathy & Nick great exposure of Till great explanations :
Cool to watch this after listening to a few of your recent podcasts. It's all coming together.
Will say it again, Washington has everything.
Great video with Kathy Troost. There are rarely visible deposits like this in Pt. Defiance Park. Glacially contorted and folded and thrust faulted silt. However, nearly all of the time landslides cover these deposits.
Thanks heaps for giving these really enthusiastic experts a chance to show us this stuff, wish all teaching was like this.
wonderful exposures too
This is Blowing my mind. Thank you professors Kathy and Nick!
Wow! This was amazing. Thanks Nick and Kathy.
I grew up in that area, really good to hear about all the formational stuff we used to find long ago. Thanks Nick and same to Kathy!
Port Washington Narrows/Bremerton; I used to live on the bluff; it was fun to explore as a kid.
Super interesting video! I'm hungry for more!
Wow! Great talk, thanks to you both.
Thank you, Dr., Troost!
6:40 " You've got a mistake down here..." (( " I love it ! " )) . . . But ... Imma gonna get even with you for correcting me on cam by titling this video "Older Glaciations..." with a picture of me pointing at you !
Haaa . . . sorry, I kid, but I was a bit struck by that "thumbnail" ... Thanks, as ever, Nick Z. for inviting us along and what a treat to hear from Kathy T. as well! B-)
So cool! I live on Camano Island and we have steep unstable banks/cliffs eroding and depositing all kinds of rocks on the beaches. All look to be un-cemented sand with layers of rounded cobbles, boulders and smaller examples. This has given me a fresh way to look at these features!!! Thanks!!!
Some of that video was filmed extremely near to where the bridge Galloping Gertie met its wobbly end in 1940.
Such top notch guests! Would love to see and hear in person. Gives us an appreciation for history. We all stand on the shoulders of giants. Current knowledge is an accumulation of wisdom from the past and enduring frameworks of knowledge everyone builds on.
Enjoying this series, and huzzah, I can help! Port Washington Narrows is where Sinclair Inlet passes to become Dyes Inlet, dividing Bremerton & Manette & spanned by the Manette bridge. I live right next to it! 😆. Also curious about exposed bluffs further south on Harstine Island!
Thank you both , I just love that you’re willing to take the time to explain this fascinating geology to us here in layman’s land
All the best Jules
Very interesting presentation. Thank you.
Awesome video!!! Makes me want to go find that spot. So cool. Thanks!
I was just in Seattle for a wedding this weekend, so needless to say I was poorly explaining the last 3 videos in this series for my family constantly 😂
Such a great series, and I love applying this knowledge(where it overlaps) to my local volcanic and shallow to deep marine deposits here in Eugene ❤
I often get confused by the difference between till and outwash. After finding this entry on Wikidiff, I think I understand. "...the difference between outwash and till is that outwash is the sediment (mostly sand and gravel) deposited by water flowing from a melting glacier while till is a cash register."
Thanks. So, outwash isn't putting the wash outside.
This was so cool, I learned so much stuff about glacial till and other processes like glacial shoving or glacial tectonics, that I've never even thought about.
I had never stopped to think about the deformation of the debris the 3000 ft of overlying ice would create as it creeps down slope. Excellent stuff Nick, please keep these coming!
Great video. My favourite subject almost 50 years ago during my degree was Quaternary studies so really enjoyed this one
Really amazing stuff thank you very much