I just assume everyone at SciShow loves their job.

Anyone know how to view the thumbnail after you've already started playing the video?

​@DemPilafian click back. The video will mimimize and you'll see the UKposts thumbnail screen.

@@WeAllLaughDownHere-ne2ou Sadly, that does not seem to work on Macs. I tried both Safari and Firefox.

@@DemPilafian in chromium: ctrl+u, in the new source tab ctrl+f and search "lurl" (the last characters from thumnailUrl), you will see a link to the thumbnail next to it

*cups hands* booooooooooooo

omg 😂

Pun

⭐️

Well played.

Missed the opportunity to say “rocks rock!”

@@dagenpracchia6683 From the pebbles on the beach to the cobbles in the street Every stone that you can see will teach you rocks rock!

David Copperfield could do it.

It's called "Learn how supervolcanoes caused the world's largest landslide in Wyoming". It's indeed absolutely worthwhile watching!

I was just going to comment this, but I thought I'd look through the comments to see if someone already had. I'm so giddy that you've seen it. Myron Cook is a fantastic geologist and UKpostsr!!!! Definitely go watch all his videos!

Ahh ah ah! Not so fast, you have to take a few steps in between!

@@AnimeSunglasses Okay so.. Pick it up, take a few steps (about a few kilometers) and then, only then can I put it down?

@@neilangelomolleda7283 NOW you're talkin'!

I'm thinking the video was recorded a long while ago (when the hair was just coming back) and only released now. He's got the curls in the ad read at the end!

​@@EcceJack Very possible! I think it's hilarious that I called this out the day before they released a video explaining why his hair is curly now.

Myron Cook did one on it: "Learn how supervolcanoes caused the world's largest landslide in Wyoming".

Ramen

Landslides also happen in the ocean and cause tsunamis.

@@lenabreijer1311ah fair enough

Maybe it's actually the biggest landslide ever discovered in the sky. If a mountain is entirely surrounded by gas, contiguous with sky air, isn't it in the sky? The floating mountain of Wyoming.

The largest landslide documented so far is the underwater Agulhas slide which occurred off the coast of South Africa 2M years ago. The estimated moved volume was in the range of 20 thousands cubic kilometers. For comparison, the volume of Everest is circa 90 cubic kilometers. So, if the Heart mountain slide was about moving one mountain, the Agulhas slide was about moving hundreds of them. Other massive slides happened in oceans. There is archeological evidence that massive landslides of the coast of Norway (estimated volumes 3500 km3) destroyed all humans settlements off the northern coasts of Europe 8000 years ago.

Same 😊 I was looking for someone else who saw it too

"Shoutout Myron Cook." - one of his videos is linked in the description.

​@@TheDanEdwards lmao you're right! I literally just watched that specific video yesterday. 😂 Very cool.

From Myron Cook's video on the subject a number of the blocks from the heart mountain slide are emplaced on top of a pyroclastic layer with a number of line of evidence indicating a large voluminous explosive volcanic event happened either contemporaneously or in close succession with the landslide. If I had to guess these blocks were probably part of the uplift crypto dome of the large caldera complex before it ultimately gave way fairly similarly to Mt. St. Helens 1980 eruption only scaled up by over 3 orders of magnitudes. If you have the time as they are a series of hour long 26 episodes in Nick Zentners A to Z Crazy Eocene livestream series from several years ago should provide some needed context as this occurred as part of the first phase of one of North Americas most dramatic tectonic and volcanic episodes the Tertiary Ignimbrite Flare up and the dramatic uplift rotation and extension which includes ripping chunks of the North American Craton off of the continent. The exact cause of this is not understood but it's timing coincides with the collision between North America and Siletzia with what is now British Colombia and Northern Washington (but would have at the start of the even have been parts of rock strata in Washington Oregon and Idaho getting thrust hundreds of Kilometers north allowing a big portion of the huge active volcanic plateau/Large igneous Province that was Siletzia and Yakutat to get slotted in place. There ere a number of these large rotational translations as well as huge siliceous volcanic episodes which coincide in time with the uplift of large metamorphic core complexes by tens of kilometers vertically all happening within the span of a few million years starting with what are today parts spread out through British Colombia Washington Oregon Idaho and Wyoming though it progressed south over time eventually making up much of what is today crust spread out over Nevada Utah New Mexico Colorado. Incidentally the slide mentioned in Utah was likely also a part of this geologic interval as that matches with the timing of the exposure of relevant metamorphic core complexes and ignimbrite flare up episodes in the region. My personal suspicion give the Crazy Eocene and subsequent Baja BC controversy series is that this episode likely was due to North America colliding with the East Pacific Rise and the major Large Igneous Province which had formed along it a contemporaneous sibling in the Pacific to Iceland linked to the Yellowstone hotspot. In this picture much of the movement would have been the unzipping of the Sevier/Laramide Orogenies which had formed as a consequence of North America colliding with a large mature microcontinental volcanic archipelago much like is in the early stages of ongoing between modern Indonesia + New Guinea and Australia. In this view you would have had the Rocky Mountains form as a Himalayan style mountain range which subsequently got unzipped as the compression which had built it up was reversed into extension. Again most of what we know about such old events is limited to the rocks that survive so the mechanisms are unknown but whatever happened it was huge and tectonically driven

Myron Cook has a comprehensive video which covers the heart mountain slide which looks at the rocks allowing you to get a real sense of scale.

The speed of sound in a solid is extremely high, based on the estimate of traveling 48km in minutes they're talking about speed of sound in air. By contrast, traveling at 1/3 the speed of sound in *rock* for just two minutes would put you about 2/3rds of the way to the moon.

You would probably be dead in this case as from Myron Cooks video on the topic some of the other large mountain sized blocks which slid in the event(this was just one of the largest and furthest flung crustal blocks) preserve a layer of what appears to be pyroclastic material likely linked to an associated voluminous explosive eruption within the Tertiary Ignimbrite Flare up episode. It is speculation based on limited evidence but given the volcanics associated it was probably at or near a VEI 8 eruption perhaps something similar to Mt. St. Helens 1980 eruption only scaled up by over a 1000 times in terms of the amount of material involved. Sadly much of the evidence on the extact specifics might be lost forever as the most recent super eruption of Yellowstone 640,000 years ago likely would have erupted through the material from the 50 million year older supervolcano that was responsible for the Heart mountain slide, as the epicenter where this crustal block came from is also within Yellowstone national park.

It is in Wyoming though not that far away from Montana as the epicenter of what was the heart mountain slide and the ancient super volcano which caused it (See Myron Cook's video on this) was in Yellowstone national Park. I suspect the existing weak point in the ground is probably why the much younger Yellowstone hotspot fed supervolcano erupted where it did 640,000 years ago.

The video was just recorded a while ago I would assume

Grind the stone, blend with ashes from burning rushes, and a little water. The alkaline ashes dissolve the limestone, forming a paste. This paste will firm up and become solid as it absorbs CO2 from the air. Pack molds with the paste; this forms the blocks with the air-tight seams. The blocks were cast in place, much like concrete. 2/3 of the workforce were growing rushes, burning them and gathering the ashes. BTW, there's a Parrot in South America that rubs leaves onto stone cliffs. The juices from the leave dissolve the stone, Parrot picks it out to make a nest. Aliens aint got sh*t on Earth!