Can a liquid sand ocean exist naturally?
I'm talking about this sort of liquid sand: https://www.youtube.com/watch?v=My4RA5I0FKs
"Desert-as-sea-analog" is present in many media, but often they lean heavily into fantasy, and it seems not many of them have explained how it works. I'm guessing it's a regular desert with some sort of geyser-like system below it that produces steam, but instead of shooting all at once, it creates steam at regular pace over wide area, which produces liquid sand effect as seen in the video above.
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Perhaps a vast colony of lithotrophic organisms lives deep beneath the sand?
Long ago, the region was a rocky plain. Then, a species of lithotrophs was introduced, and they began to consume the very rock. The resulting by-products? Sand and oxygen rich gas.
Over millions of years, the lithotroph colony has excavated deep into the crust, leaving above it a vast desert. Their gaseous excretions acting to liquify the sand above.
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