Geology of Central Oregon

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Deschutes Public Library

Deschutes Public Library

2 жыл бұрын

The volcanic landscapes of Central Oregon have been shaped by tectonic forces that are active on a global scale. Here in Central Oregon, these forces interact to create a geologically diverse region of snow-covered volcanic peaks, landscapes created by faults, and some of the largest volcanic eruptions on earth. In this presentation, geologist Daniele McKay explores recent geologic research that has changed our understanding of the region's landscapes.
Dr. Daniele McKay is an adjunct instructor in the Department of Earth Sciences at the University of Oregon. She lives in Bend, Oregon, and teaches online geology courses throughout the academic year, and field courses in central Oregon during the summer. Her research background is in physical volcanology with a focus on recent mafic eruptions in the Central Oregon Cascades. She is also interested in how societies prepare for and respond to natural disasters, especially volcanic eruptions and earthquakes. She has worked with Deschutes County, the Oregon Office of Emergency Management, Oregon Partnership for Disaster Resilience, and the Red Cross on natural hazard preparedness and mitigation in central Oregon.
Music: www.bensound.com

Пікірлер: 42
@ericartzt
@ericartzt 2 жыл бұрын
Thank you Dr. McKay, Paige and Deschutes Public Library. Very informative.
@robertmeyersMeyers-cm9fy
@robertmeyersMeyers-cm9fy 4 ай бұрын
Great presentation, very informative, thanks for making it available.
@brianshissler3263
@brianshissler3263 5 ай бұрын
My family visited some lave tube caves in Bend, and went to the obsidian mountain. Pretty amazing sights!
@davec9244
@davec9244 2 жыл бұрын
very well done you got all the points, and very understandable. thank you
@crowesarethebest
@crowesarethebest 8 ай бұрын
An excellent presentation. Thank you for posting.
@dougfitzpatrick1871
@dougfitzpatrick1871 2 жыл бұрын
That is the best geological presentation I've seen
@miller323334
@miller323334 2 жыл бұрын
Excellent presentation, thanks!
@laurienielsen8031
@laurienielsen8031 2 жыл бұрын
Fantastic. I am glad I found this. Thank you.
@margreetanceaux3906
@margreetanceaux3906 10 ай бұрын
I’m only as far as how water and oxygen change how the mantle behaves - with the salt and ice analogy: you have a great talent for explaining the basics! Thanks!
@dancooper8551
@dancooper8551 2 жыл бұрын
Excellent presentation!! Thank you!🌋
@robotic_musings
@robotic_musings Жыл бұрын
Wonderful program! Thank you!
@greenman6141
@greenman6141 Жыл бұрын
What an astonishingly great lecture. It was both wide and deep and answered questions that have been pestering me for years. I have wondered for ages about the implications of a continent running over a divergent boundary. This was the first time I've heard someone pretty much say straight out that this is connected to the basin and range extension. Also this was the first time I heard such a good explanation of the Nisqually (I'm sure to be spelling that incorrectly...dyslexia...I spell my own name incorrectly all the time) quake. So impressive. So much stuff explained so clearly and in such plain, understandable terms. The animations were excellent.
@lisac5287
@lisac5287 Жыл бұрын
Outstanding, and those photos are stunning!
@naakatube
@naakatube 6 ай бұрын
Great thanks ❤❤❤
@Trail.Ready.Development
@Trail.Ready.Development 9 ай бұрын
Love this!!
@gerrycoleman7290
@gerrycoleman7290 Жыл бұрын
The evidence of pending eruptions can extend over many months. Take for example Mt. St. Helens. In 1978 I observed steam venting near the summit of the mountain, sulfur being deposited along cracks in andesite bedrock miles from the mountain, soil profile temperatures much higher than typical in areas proximate to hydrothermally altered deposits miles from the mountain.
@gregburke8163
@gregburke8163 7 ай бұрын
👍👍
@mostlyguesses8385
@mostlyguesses8385 10 ай бұрын
Can siletzia be called Continental Crust, it's seafloor rock made in huge gush that arrived submerged 1km and now 4km of Cascade sediment has covered it. East of Siletzia mid state is 20km of sediment to make dry land, not classic continental crust... imagine the Yakutat offshore in Alaska but little sediment on it, Oregon is muddier twin of that so get dry mud up top at Coos Bay..... Or not
@gerrycoleman7290
@gerrycoleman7290 Жыл бұрын
Some say the composition of the Crooked River caldera rhyolites do not match up with the Yellowstone hot spot line of super volcanos rhyolites. Some say they do. Which is it?
@n539rv
@n539rv 2 жыл бұрын
It was a good overview, not much specifics to Central Oregon. Leaving out any mention of accreted Terranes that made all of OR/WA really misses the boat for explaining the variety of composition.
@sbkarajan
@sbkarajan Жыл бұрын
Where is subduction occurring around Antarctica? I see mid ocean ridge around Antarctica, but no subduction nor volcanism around Antarctic plate????
@darrelpeterson1553
@darrelpeterson1553 2 жыл бұрын
I'm watching 2 months later and I don't see any maps or graphics ???
@darrelpeterson1553
@darrelpeterson1553 2 жыл бұрын
Ok I fast forward a bit and see them now!!!
@briane173
@briane173 2 жыл бұрын
52:43 A better example of a thrust fault earthquake in Puget Sound from that northward squeezing motion would be the earthquake that took place 1,100 years ago on the Seattle Fault, which is the east-west fault that runs under Downtown Seattle and through Bremerton, etc. The NIsqually earthquake was a _slab_ earthquake that struck _within_ the subducting Juan de Fuca Plate, in and around the transition zone. The Nisqually quake was about 40-some miles deep where the JDF plate is curving downward toward the mantle and under the Cascades. It's not attributed to the northward squeezing of WA from the Oregon crustal block; but the Seattle quake is definitely caused by it.
@mostlyguesses8385
@mostlyguesses8385 Жыл бұрын
What other hotspots migrate mid continent? Does it take thin accreted terrane to allow burn thru? I guess often hotspot is in rift like Ethiopia so not quite a migrating track... I guess there's the lil hotspot in BC. . . . Maybe super old ones now erased ...
@margreetanceaux3906
@margreetanceaux3906 10 ай бұрын
Eifel hotspot in Germany, definitely mid-continent, but not migrating though. (And dormant; not dead). The way I (completely ignorant…) understand it, there’s some doubt about the hotspot-status: had it simply seized the opportunity of a breaking and stretching surface - or the other way around?
@mostlyguesses8385
@mostlyguesses8385 10 ай бұрын
@@margreetanceaux3906 ... Besides physical rock reasons can volcanism occur in what should be quiet area due to chemistry of the rock allowing melting at normally inadequate temp/pressure. Can mineral type matter that much?... On the craton 150km thick hard to imagine vertical crack, vs California just 30km...
@margreetanceaux3906
@margreetanceaux3906 10 ай бұрын
@@mostlyguesses8385 Born and raised (70 yrs) in Rotterdam, which is geologically speaking at the mouth of the Rhine, I only very recently learned that the Rhine goes through the ECRIS, the European Cenozoic Rift System. That’s a rift from (south) the mouth of the Rhône in the Mediterranean, to (north) the mouth of the Rhine in the North Sea. The Eifel hotspot is in or directly adjacent to that rift.
@mostlyguesses8385
@mostlyguesses8385 10 ай бұрын
@@margreetanceaux3906 ... North America by Chicago almost rifted apart but stopped, and now the crust is thick there. Duluth Minnesota has cliffs from this volcanic rift leaking up magma... If you have thick square logs floating and 2 almost separate do they come back together and so there is no thin crust at the old rift? ...
@margreetanceaux3906
@margreetanceaux3906 10 ай бұрын
@@mostlyguesses8385 I honestly have mo idea… There’s no ‘coming back together’. Basically the Rhine goes through a graben, and although it’s not highly active, it’s certainly not frozen in time. These rifts (as ignorant me understands it) are under pressure from the African continent moving northward, and the Mid-Atlantic Ridge, spreading between the North-American and European plates.
@gerrycoleman7290
@gerrycoleman7290 9 ай бұрын
Toba is not the largest volcanic eruption on Earth by a long shot. There have been several that ejected over 5000 cubic kilometers. Look at La Garita as an example.
@bobbyshaftowenttosea5410
@bobbyshaftowenttosea5410 4 ай бұрын
30
@angryviking4496
@angryviking4496 Жыл бұрын
Awesome video however, I disagree on your timelines. Yes, I am a Young Earth Creationist. ✌
@comment8767
@comment8767 Жыл бұрын
Audio is bad ...
@tomstanley7568
@tomstanley7568 5 ай бұрын
its mostly biology we have the net now come on man get with the times your getting left behind
@tomstanley7568
@tomstanley7568 5 ай бұрын
we walk on giants turned to stone your missin at least half the big picture
@wildwolfwind6557
@wildwolfwind6557 Жыл бұрын
Nice visuals. 🏔⛰ It's good to see more updated information. It's still rare to see anything about the Yellowstone hotspot going farther back than the past 3 major eruptions and/or anything pertaining to the clockwise rotation. Nice to see more. I like that you linked the Crooked River Caldera to the Yellowstone hotspot; however my understanding is that the current occurrence of clockwise rotation started ~16Ma and the previous occurrence was from ~85 Ma to 45 Ma. It's questionable that there was enough rotation inland to move / rotate the Crooked River caldera that far north, but the Straight Creek / Fraser fault (in Wa & BC) may have gone farther south and not be evident today due to the CRB covering it. I still think the Crooked River caldera may be associated with the Yellowstone hotspot though there is still debate. I'm surprised that one of the slides showed Siletzia but you didn't link Siletzia to the Yellowstone hotspot. 😕 I find it interesting that the bulk of the CRB was ~16 Ma, the San Andreas started ~16 Ma (though some have other dates), and that the clockwise rotation started ~16 Ma. 🏔🌋
@dirtylilloggersgirl
@dirtylilloggersgirl Жыл бұрын
First learn to pronounce the area names! Its ridiculous. Its pronounced. Des- shoots not di-chutes. Its seriously disheartening
@handendaer
@handendaer Жыл бұрын
whats hits utter nonsense? carbon dating,,, for the public schoold zombies
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