Heart Mountain (Wyoming) Slide

I opened this in the middle looking for what he was talking about but was lost until I heard him mention the Heart Mountain (Wyoming) Slide.

Between 50 and 48 million years ago a sheet of rock about 500 square miles (1,300 square kilometers) in area detached from the plateau south of the Beartooths and slid tens of kilometers to the southeast and south into the Bighorn and Absaroka Basins.[1] This sheet, consisting of Ordovician through Mississippian carbonate rocks and overlying Absaroka volcanic rocks, was probably originally about 4 to 5 kilometers (2.5 to 3.1 mi) thick. Although the slope was less than 2 degrees, the front of the landslide traveled at least 25 miles (40 km) and the slide mass ended up covering over 1,300 square miles (3,400 km2). This is by far the largest rockslide known on land on the surface of the Earth and is comparable in scale to some of the largest known submarine landslides.[2]
On looking it up, I was incredulous. How did I not hear of this and how is this not common knowledge?
What would that look like?

 

  Here is a puny one by comparison and it is dramatic enough.

​Another small slide. I couldn’t figure out where that black mass came from.

This video expalined it.

I mentioned this Markagunt Megaslide one before. It is number 2 on the list of the largest.

There are loads of other landslide videos online now. Before the web and cell phones footage was impossible to see, now it is a deluge. Times change.
There are many landslides waiting to happen. Some are potentially huge. Better tools are starting to find them lurking around the world. Marine ones can be super deadly due to tsunamis.

 

The same guy that did the first video did this one. I was waiting for him to mention the Bell Paleo River but he didn’t. He is a good presenter. A sort of cheery, soothing Mr. Rogers type. I don’t know if he is trying to reach kids and he didn’t say but he is good at it. His channel has some very good videos. Worth a look.

2 comments

  1. And now a massive, town swallowing landslide in New Guinea. Within days of you posting this. The space time continuum is…weird.

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