Snow avalanches can be compared to landslides. Loose-powder avalanches move like a flow and slab avalanches move like a slide.
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What is Avalanches?</h3>
Avalanches can start spontaneously, as a result of causes like increasing precipitation or decreasing snowpack, or by outside forces like people, animals, and earthquakes. Large avalanches can catch and move ice, rocks, and trees. They are mostly made of rushing snow and air.
The two main types of avalanches are slab avalanches, which are built of tightly packed snow and are caused by the collapse of a weak snow layer beneath them, and loose snow avalanches, which are made of looser snow. Avalanches typically accelerate quickly after being triggered and increase in bulk and volume as more snow is gathered. A powder snow avalanche could emerge if an avalanche moves quickly enough to mix part of the snow with the air.
To learn more about avalanches with the given link
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I would say D the Billingsella Corrugata, it IS in the oldest recorded time line, so by theory, it's the oldest (Don't quote me on that, I'm not %100)
well some word like dog-food and cat-fish
are named by their looks, feel, or even what they are used for.
I believe its true, i'm not entirely sure.
