4 ms·
That doesn't make a lot of sense to me - how could an avalanche travel that far without running out of kinetic energy?
by Jaauthor 2y ago
That doesn't make a lot of sense to me - how could an avalanche travel that far without running out of kinetic energy?
- bell-cot 2y agoTake the mass of a few cubic miles of rock, let it fall (slide down an underwater slope) a mile-ish, and there's an ample supply of 0.5mv^2. And, whether above or below water, really huge avalanches have dynamics that seem quite counterintuitive. (Due to the square/cube law and other effects.)
- bloopernova 2y agoThe base layer acts like a set of bearings mixed with lubricant, allowing the avalanche to roll a lot further than seems possible. EDIT: liquefaction can have very strange effects.
- lagniappe 2y agoFluidized bed movement. In the reef hobby we use filtration that operates on this principle - in essence, instability with fluid movement of semi uniform particles allows those particles to move as if they were a liquid if that makes sense.
- pixl97 2y agoEven above water level landslides can go surprisingly far when a layer liquifies or otherwise goes through a phase change. https://en.wikipedia.org/wiki/Heart_Mountain_(Wyoming) https://en.wikipedia.org/wiki/Heart_Mountain_(Wyoming)
- dvh 2y agoMaybe via: https://en.wikipedia.org/wiki/Turbidity_current https://en.wikipedia.org/wiki/Turbidity_current https://en.wikipedia.org/wiki/Submarine_canyon https://en.wikipedia.org/wiki/Submarine_canyon If you look at google maps on ocean floor near any major river you'll see it continue for hundreds of km. Longest is 2400km in bay of bengal.