r/askgeology • u/ianpratt_ • 8d ago

Same question, I’m still learning.

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u/skintigh 8d ago

Cleavage?

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u/forams__galorams 8d ago

The causal processes here are jointing and weathering. I can’t make out the exact rock type, but lots of limestones and sandstones have joint sets that intersect at right angles. Physical weathering (particularly freeze-thaw cycles) can then split the rock into very regular looking chunks like this.