

From the wiki article:
The Chocolate Hills are conical karst that consist of Late Pliocene to Early Pleistocene, thin to medium-bedded, sandy to rubbly marine limestone. They contain abundant fossils of shallow marine foraminifera, coral, mollusks, and algae.[9][10] These conical hills are geomorphological features called cockpit karst, which were created by a combination of the dissolution of limestone by rainfall, surface water, and groundwater, and their subaerial erosion by streams after they had been uplifted above sea level and fractured by tectonic processes. The hills are separated by flat plains and contain numerous caves and springs.
I’m shocked… That he got the expression correct.