On the low cliff down along the beach, the rock has broken away revealing...a plastic bottle!
I would have thought these sandstone cliffs were at least some tens of thousands of years old, perhaps deposited as windblown inland dunes during the last ice age, when the sea level was lower. and the islands of the Bahamas were considerably larger.
Can sand consolidate so fast, and in the face of the sea? I await the comment here of my soft-rock geologist daughter.