It’s the same thing in S Texas. We had a home in San Antonio, under 6 inches of top soil is solid bedrock. No basement possible.
In the Austin area, there is a very wide and deep seam or seams of limestone,,,tons of quarries around. We hit limestone about 18 inches under our soil. It’s everywhere.
A basement is always possible, it just may be expensive to excavate the rock in order to build the basement. Our rock in New Hampshire is way harder than limestone, but we still manage to blast through it when necessary.
The expense of not having a basement just became apparent today in Oklahoma. Perhaps future designers of school buildings will consider spending the extra money on excavation.