i think that streams eroded the rock over time making a narrow canyon thingy.
I think it is from a dry river.
erosion and water washing it away.
Creeks form the slot canyons.
EARTHQUAKES!!!!! (THAT WAS A GUESS, and my caps was on sorry)
It looks like it forms by earthquakes. It looks like the two walls fit together.
Process of Science
Igneous Rocks and Bubbles
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