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Agent641@lemmy.world ⁨6⁩ ⁨hours⁩ ago

Fun fact a rich guy once bought the mining rights to a meteorite impact crater believing that it would be an easy source of pure iron to mine since most meteorites are primarily iron, but after digging for hundreds of feet and finding no iron the project ran out of money and went bust, because meteorites disintegrate into first a liquid iron, which then oxidised very rapidly and becomes dust and small chunks which settle in an ejecta pattern around the impact zone, so.etimes many miles wide, and this thing layer is fairly quickly eroded away, so there’s no usable iron nor a meaningful amount of oxide remaining.

Smaller meteorites often land intact, as their surface area allows for meaningful atmospheric friction to slow them down, and these are chunks of iron, but larger than about the size of a large van, the meteorite is usually obliterated.

Entry angle can allow for exceptions, IE I’d a meteorite just grazes the atmosphere but still slows down enough to suborbital speeds,it can land as big chunks, but eve.ln these get scattered over hundreds of kilometres. Any impact steeper than about 20 degrees and larger than a large van is usually carrying so much momentum at ground level that it hits at several, and possibly tend if kilometres per second, which liquifies and scatters it widely.

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