This Page Hyperlinked [click on] Mount Baker Stratovolcano (background)© ™ ®/ Kulshan Stratovolcano© ™ ®, Simon Fraser University (foreground)© ™ ® ~ Image by Stan G. Webb - In Retirement© ™ ®, An Intelligent Grandfather's Guides© ™ ® next, The Man From Minto© ™ ® - A Prospector Who Knows His Rocks And Stuff© ™ ®
Learn more about the Cascadia Volcanic Arc© ™ ® (Part of Pacific Ring of Fire) Cascadia Volcanoes© ™ ® and the currently active Mount Meager Massif© ™ ®, part of the Cascadia Volcanic Arc© ™ ® [ash flow, debris flows, fumaroles and hot springs], just northwest of Pemberton and Whistler, Canada ~ My personal interest in the Mount Meager Massif© is that the last volcanic vent blew north, into the Bridge River Valley [The Bridge River Valley Community Association (BRVCA), [formerly Bridge River Valley Economic Development Society], near my hometown. I am the Man From Minto© ™ ® - A Prospector Who Knows His Rocks And Stuff© ™ ® Mount Meager Massif© lahar was the largest landslide in Canadian history and one of over 20 landslides to have occurred from the Mount Meager massif in the last 10,000 years. This lahar [a large catastrophic debris avalanche] that flowed to the south, into the Lillooet Valley British Columbia, Canada, on August 6 at 3:27 a.m. PDT (UTC-7). More than 45,000,000 m3 (1.6×109 cu ft) of debris slid down Mount Meager, temporarily blocking Meager Creek and destroying local bridges, roads and equipment. The landslide was large enough to send seismic waves more than 2,000 km (1,200 mi) away into the neighbouring U.S. states of Alaska and Washington and beyond. Multiple factors led to the slide: Mount Meager's weak slopes have left it in a constant state of instability. The massif has been a source of large volcanic debris flows for the last thousands of years, many of which have reached several tens of kilometres downstream in the Lillooet River valley, to the south. It is arguably the most unstable mountain massif in Canada and may also be its most active landslide area. On the north side of the large Mt. Meager massif volcano complex lies Downton Lake Hydro Reservoir, impounded by the La Joi Dam, the uppermost of the Bridge River Project dams. The earliest identified Holocene landslide was in 7900 BP (before the present, or read it as the number of years ago). Further landslides occurred in 6250 BP, 5250 BP, 4400 BP, 2600 BP, 2400 BP, 2240. BP BP, 2170 BP, 1920 BP, 1860 BP, 870 BP, 800 BP, 630 BP, 370 BP, 210 BP, 150 BP and in 1931, 1947, 1972, 1975, 1984, 1986 and 1998. These events were attributed to structurally weak volcanic rocks, glacial unloading, recent explosive volcanism and glacial activity. The last volcano on the top of the massif, however, blew to the north 2,460 years ago, sending talus all the way to Alberta. At the Gold Bridge Golf Course, Bridge River Valley, BC you can play the nine hole course on that talus. . Those who dance with earthquakes and volcanoes are considered mad by those who cannot smell the sulphur. . We begin to deal with BIG (MEGA) EARTHQUAKES at Simon Fraser University (foreground) Kulshan Stratovolcano© / Mount Baker Stratovolcano (background)©New Cascadia Dawn© - Cascadia Rising - M9 to M10+, An Intelligent Grandfather's Guide© next, ~ Images by Stan G. Webb - In Retirement©, An Intelligent Grandfather's Guides©


Countdown to Earthquake Drill - International Great ShakeOut Day is on Thursday, October 20, 2022 at 10:20AM, and annually on the 3rd Thursday in October thereafter - -

Showing posts with label Volcanoes in Western North America. Show all posts
Showing posts with label Volcanoes in Western North America. Show all posts

Sunday, February 7, 2021

Volcanic evolution of the Pacific Northwest: 55 million year history

https://youtu.be/3o3IJlAHhTE   [5:11 minutes]

IRIS Earthquake Science

OSU/IRIS Collaboration--Pacific Northwest Earth-science series. Tectonics of the Pacific Northest yield a varied volcanic history. The Pacific Northwest boasts an active volcanic arc (Cascades Range), a nearby ocean ridge (Pacific Plate-Juan de Fuca Plate spreading ridge), the world’s youngest flood basalt province (Columbia River Basalt), a hot-spot chain of eastward-younging volcanoes (Yellowstone Trend), volcanism related to continental extension, and more. It is a volcanological wonderland. The western margin of North America has long been dominated by subduction and dextral transtension. This animation attempts to simplify a complex tectonic interaction through cross sections. This animation was created to accompany a Plenary talk at the 2017 IAVCEI meeting in Portland, OR. Written and directed by Anita Grunder, Oregon State University Graphics, animation, & narration by Jenda Johnson,Earth Sciences Animated Reviewed by Ray Wells, U.S. Geological Survey


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Tuesday, May 28, 2019

Climate change could wake up Canada's dormant volcanoes

https://youtu.be/S7ADoIHXHUQ   [6:21 minutes]

CBC
News: The National
Published on Dec 5, 2018
Scientists at Simon Fraser University argue that climate change is destabilizing
volcanoes around the world, and they're using a British Columbia mountain range to prove their theory. Not far from Whistler, Mount Meager shows signs of dangerous things to come, which has researchers keeping a very close eye on it. Welcome to The National, the flagship nightly newscast of CBC News »»» Subscribe to The National to watch more videos here: https://www.youtube.com/user/CBCTheNa...
Voice Your Opinion & Connect With Us Online: The National Updates on Facebook: https://www.facebook.com/thenational
The National Updates on Twitter: https://twitter.com/CBCTheNational
»»» »»» »»» »»» »»» 
The National is CBC Television's flagship news program. Airing six days a week, the show delivers news, feature documentaries and analysis from some of Canada's leading journalists.
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Friday, November 23, 2018

Earth's Extremes - Volcanoes in British Columbia, Canada | Part #1

UPDATED   https://youtu.be/5iDUzzZ9KTU [2:17 minutes]

Planetedge
Published on Oct 22, 2015
Thanks for watching [when you click on the below links you will be asked if you want to leave YouTube and go to the website; please click GO TO SITE where you can continue your investigation ~ then, later the << Back Arrow to get back to YouTube].
Anahim Peak https://en.wikipedia.org/wiki/Anahim,
Armadillo Peak https://en.wikipedia.org/wiki/Armadil,
Ash Mountain https://en.wikipedia.org/wiki/Ash_Mou,)
The Ash Pit https://en.wikipedia.org/wiki/The_Ash,
Atwell Peak https://en.wikipedia.org/wiki/Atwell_,
Bennett Lake Volcanic Complex,
Black Dome Mountain https://en.wikipedia.org/wiki/Black_D,
The Black Tusk https://en.wikipedia.org/wiki/The_Bla,
Blackfoot diatreme https://en.wikipedia.org/wiki/Blackfo,
Big Timothy Mountain https://en.wikipedia.org/wiki/Big_Tim,
Mount Boucherie https://en.wikipedia.org/wiki/Mount_B,
Bowie Seamount https://en.wikipedia.org/wiki/Bowie
Mount Brew (Cheakamus River) https://en.wikipedia.org/wiki/Mount_B,)
Bridge River Cones https://en.wikipedia.org/wiki/Bridge_,
Buck Hill (British Columbia) https://en.wikipedia.org/wiki/Buck_Hi,)
Cache Hill https://en.wikipedia.org/wiki/Cache_Hill
Mount Callaghan https://en.wikipedia.org/wiki/Mount_C,
Camp Hill (British Columbia) https://en.wikipedia.org/wiki/Camp_Hi,)
Capricorn Mountain https://en.wikipedia.org/wiki/Caprico,
Caribou Tuya https://en.wikipedia.org/wiki/Caribou,
Cartoona Peak https://en.wikipedia.org/wiki/Cartoon,
The Castle (volcano) https://en.wikipedia.org/wiki/The_Cas,)
Castle Rock (volcano) https://en.wikipedia.org/wiki/Castle_,)
Cauldron Dome https://en.wikipedia.org/wiki/Cauldro,
Mount Cayley https://en.wikipedia.org/wiki/Mount_C,
Chakatah Creek Peak https://en.wikipedia.org/wiki/Chakata,
Chelan Seamount https://en.wikipedia.org/wiki/Chelan_,
Chikoida Mountain https://en.wikipedia.org/wiki/Chikoid,
Cinder Cliff https://en.wikipedia.org/wiki/Cinder_,
Cinder Cone https://en.wikipedia.org/wiki/Cinder_,)
Cinder Mountain https://en.wikipedia.org/wiki/Cinder_,
Clinker Peak https://en.wikipedia.org/wiki/Clinker,
Clisbako Caldera Complex https://en.wikipedia.org/wiki/Clisbak,
Cocoa Crater https://en.wikipedia.org/wiki/Cocoa_C,
Coffee Crater https://en.wikipedia.org/wiki/Coffee_,
Cottonwood Peak https://en.wikipedia.org/wiki/Cottonw,
Cracker Creek Cone https://en.wikipedia.org/wiki/Cracker,
Cross diatreme https://en.wikipedia.org/wiki/Cross_d,
Crow Lagoon https://en.wikipedia.org/wiki/Crow_La,
Dark Mountain https://en.wikipedia.org/wiki/Dark_Mo,
Dellwood Seamounts https://en.wikipedia.org/wiki/Dellwoo,
Devastator Peak https://en.wikipedia.org/wiki/Devasta,
Dome Mountain https://en.wikipedia.org/wiki/Dome_Mo,
Mount Downton https://en.wikipedia.org/wiki/Mount_D,
Dragon Cone https://en.wikipedia.org/wiki/Dragon_,
Dufferin Island https://en.wikipedia.org/wiki/Dufferi,
Mount Edziza https://en.wikipedia.org/wiki/Mount_E,
Mount Edziza volcanic complex [50] https://en.wikipedia.org/wiki/Mount_E,
Ember Ridge https://en.wikipedia.org/wiki/Ember_R,
Enid Creek Cone https://en.wikipedia.org/wiki/Enid_Cr,
Eve Cone https://en.wikipedia.org/wiki/Eve_Cone
Exile Hill https://en.wikipedia.org/wiki/Exile_Hill
Explorer Seamount https://en.wikipedia.org/wiki/Explore,

 Earth's Extremes - Volcanoes in British Columbia, Canada | Part #2

 Continue,.. Source: https://en.wikipedia.org/wiki/List_of,
Music: Big Cars,
Silent Partner; YouTube Audio Library
A volcano is a rupture on the crust of a planetary mass object, such as the Earth, which allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface. Earth's volcanoes occur because the planet's crust is broken into 17 major, rigid tectonic plates that float on a hotter, softer layer in the Earth's mantle. Therefore, on Earth, volcanoes are generally found where tectonic plates are diverging or converging. For example, a mid-oceanic ridge, such as the Mid-Atlantic Ridge, has volcanoes caused by divergent tectonic plates pulling apart; the Pacific Ring of Fire has volcanoes caused by convergent tectonic plates coming together. Volcanoes can also form where there is stretching and thinning of the crust's interior plates, e.g., in the East African Rift and the Wells Gray-Clearwater volcanic field [Wells Gray-Clearwater volcanic field – Wikipedia [https://en.wikipedia.org/wiki/Wells_Gray-Clearwater_volcanic_field] (The Wells Gray-Clearwater volcanic field, also called the Clearwater Cone Group, is a potentially active monogenetic volcanic field in east-central British Columbia.)
In addition, there is the Rio Grande Rift in North America. This type of volcanism falls under the umbrella of "plate hypothesis" volcanism. Volcanism away from plate boundaries has also been explained as mantle plumes. These so-called "hotspots",[ Hotspot (geology) – Wikipedia; for example Hawaii, are postulated to arise from up welling diapirs [Diapir – Wikipedia ] with magma from the core–mantle boundary, 3,000 km deep in the Earth. Volcanoes are usually not created where two tectonic plates slide past one another.

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Earth's Extremes - Volcanoes in British Columbia, Canada | Part #2

UPDATED
https://youtu.be/QKArquyAISY  [1:42 minutes]

Planetedge
Published on Oct 26, 2015
Thanks for watching....
Powder Mountain (British Columbia) https://en.wikipedia.org/wiki/Powder_...)
Mount Price (British Columbia) https://en.wikipedia.org/wiki/Mount_P...)
Pylon Peak (British Columbia) https://en.wikipedia.org/wiki/Pylon_P...)
Pyramid Mountain (Wells Gray-Clearwater) https://en.wikipedia.org/wiki/Pyramid...)
Rainbow Range (Chilcotin Plateau) https://en.wikipedia.org/wiki/Rainbow...)
Mount Ray (British Columbia) https://en.wikipedia.org/wiki/Mount_R...)
Ring Mountain (British Columbia) https://en.wikipedia.org/wiki/Ring_Mo...)
Round Mountain (volcano) https://en.wikipedia.org/wiki/Round_M...)
Music: Bounce House,
Silent Partner; YouTube Audio Library
A volcano (underwater, called a seamount) is a rupture on the crust of a planetary mass object, such as the Earth, which allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface. Earth's volcanoes occur because the planet's crust is broken into 17 major, rigid tectonic plates that float on a hotter, softer layer in the Earth's mantle. Therefore, on Earth, volcanoes are generally found where tectonic plates are diverging or converging. For example, a mid-oceanic ridge, such as the Mid-Atlantic Ridge, has volcanoes caused by divergent tectonic plates pulling apart; the Pacific Ring of Fire has volcanoes caused by convergent tectonic plates coming together. Volcanoes can also form where there is stretching and thinning of the crust's interior plates, e.g., in the East African Rift, the Wells Gray -Clearwater volcanic field and Rio Grande Rift in North America. This type of volcanism falls under the umbrella of "plate hypothesis" volcanism. Volcanism away from plate boundaries has also been explained as mantle plumes. These so-called "hotspots", for example Hawaii, are postulated to arise from upwelling diapirs with magma from the core–mantle boundary, 3,000 km deep in the Earth. Volcanoes are usually not created where two tectonic plates slide past one another.

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Tuesday, November 13, 2018

Earth's Extremes - Volcanoes in Oregon, United States #Part 1



Published on Aug 7, 2016
Thanks for watching... 
Mount Bachelor
https://en.wikipedia.org/wiki/Mount_B...
Bald Mountain Caldera https://volcanoes.usgs.gov/volcanoes/...
Mount Bailey https://en.wikipedia.org/wiki/Mount_B...)
Belknap Crater https://en.wikipedia.org/wiki/Belknap...
Black Butte https://en.wikipedia.org/wiki/Black_B...)
Blue Lake Crater https://en.wikipedia.org/wiki/Blue_La...
Broken Top https://en.wikipedia.org/wiki/Broken_Top
Brown Mountain https://en.wikipedia.org/wiki/Brown_M...)
Cinnamon Butte https://en.wikipedia.org/wiki/Cinnamo...
Columbia River Basalt Group https://en.wikipedia.org/wiki/Columbi...
Crater Lake or Mount Mazama https://en.wikipedia.org/wiki/Mount_M...
Crooked River caldera https://en.wikipedia.org/wiki/Crooked...
Diamond Craters https://en.wikipedia.org/wiki/Diamond...
Diamond Peak https://en.wikipedia.org/wiki/Diamond...)
Fort Rock https://en.wikipedia.org/wiki/Fort_Rock
Gorda Ridge https://en.wikipedia.org/wiki/Gorda_R...
Gray Butte Mount Hood https://en.wikipedia.org/wiki/Mount_Hood
Source: https://en.wikipedia.org/wiki/List_of...
Music: Raindrops,Huma-Huma; YouTube Audio Library A volcano is a
rupture on the crust of a planetary mass object, such as the Earth,
which allows hot lava, volcanic ash, and gases to escape from a magma
chamber below the surface. Earth's volcanoes occur because the
planet's crust is broken into 17 major, rigid tectonic plates that
float on a hotter, softer layer in the Earth's mantle. Therefore, on
Earth, volcanoes are generally found where tectonic plates are
diverging or converging. For example, a mid-oceanic ridge, such as
the Mid-Atlantic Ridge, has volcanoes caused by divergent tectonic
plates pulling apart; the Pacific Ring of Fire has volcanoes caused
by convergent tectonic plates coming together. Volcanoes can also
form where there is stretching and thinning of the crust's interior
plates, e.g., in the East African Rift and the Wells Gray-Clearwater
volcanic field and Rio Grande Rift in North America. This type of
volcanism falls under the umbrella of "plate hypothesis"
volcanism. Volcanism away from plate boundaries has also been
explained as mantle plumes. These so-called "hotspots", for
example Hawaii, are postulated to arise from upwelling diapirs with
magma from the core–mantle boundary, 3,000 km deep in the Earth.
Volcanoes are usually not created where two tectonic plates slide
past one another. Erupting volcanoes can pose many hazards, not only
in the immediate vicinity of the eruption. One such hazard is that
volcanic ash can be a threat to aircraft, in particular those with
jet engines where ash particles can be melted by the high operating
temperature; the melted particles then adhere to the turbine blades
and alter their shape, disrupting the operation of the turbine. Large
eruptions can affect temperature as ash and droplets of sulfuric acid
obscure the sun and cool the Earth's lower atmosphere (or
troposphere); however, they also absorb heat radiated up from the
Earth, thereby warming the upper atmosphere (or stratosphere).
Historically, so-called volcanic winters have caused catastrophic
famines. At the mid-oceanic ridges, two tectonic plates diverge from
one another as new oceanic crust is formed by the cooling and
solidifying of hot molten rock. Because the crust is very thin at
these ridges due to the pull of the tectonic plates, the release of
pressure leads to adiabatic expansion and the partial melting of the
mantle, causing volcanism and creating new oceanic crust. Most
divergent plate boundaries are at the bottom of the oceans;
therefore, most volcanic activity is submarine, forming new seafloor.
Black smokers (also known as deep sea vents) are an example of this
kind of volcanic activity. Where the mid-oceanic ridge is above
sea-level, volcanic islands are formed, for example, Iceland.
Subduction zones are places where two plates, usually an oceanic
plate and a continental plate, collide. In this case, the oceanic
plate subducts, or submerges under the continental plate forming a
deep ocean trench just offshore. In a process called flux melting,
water released from the subducting plate lowers the melting
temperature of the overlying mantle wedge, creating magma. This magma
tends to be very viscous due to its high silica content, so often
does not reach the surface and cools at depth. When it does reach the
surface, a volcano is formed. Typical examples of this kind of
volcano are Mount Etna and the volcanoes in the Pacific Ring of Fire.

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Thursday, October 18, 2018

Deadliest Volcanoes /// History Channel Documentary



Volcanoes, Deadliest /// History Channel Documentary
https://youtu.be/9AvatFWUoLE  [2:38:31 minutes]
World Documentary
Published on Nov 12, 2014
PLEASE SUBSCRIBE---------- pb. Could the explosion of Iceland's ticking time bombs cause cold and famine worldwide? Deadliest Volcanoes - Documentary document. PLEASE SUBSCRIBE---------- pb. Could the explosion of Iceland's ticking time bombs cause cold and famine worldwide? Deadliest Volcanoes - Documentary documentary. The 1883 eruption of Krakatoa in the Dutch East Indies (now Indonesia) began on August 26, 1883 (with origins as early as May of that year) and culminated wi. PBS Nova Season 39 Episode 9: Deadliest Volcanoes - Documentary documentaries, documentary, documentaries 2014, youtube documentaries, documentaries online

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