What is the origin of the Chocolate Hills?


These conical hills, which are separated by flat plains and contain numerous caves and springs, are similar to other calcareous rock found in Slovenia, Croatia, Puerto Rico or Cuba.

It is a characteristic landform of certain karst landscapes, that is, arising from a combination of the dissolution of the rock by the effect of rain, surface water and groundwater.

Originally the components that form it were deposited in the sea by accumulation of limestone skeletons of marine organismss (corals, mollusks …) and later, during the Pliocene, about five million years ago, the calcareous rock was fractured and raised above sea level due to tectonic processes.

In fact, there is a plaque made of bronze in the viewpoint of the municipality of Carmen that says the following:

“The unique landform known as Bohol’s Chocolate Hills was formed centuries ago by the rise of coral deposits and the action of rainwater and erosion. The grassy hills were once coral reefs that arose of the sea in massive geological change. Wind and water put the finishing touches for hundreds of thousands of years. “

Regarding its name, its origin is much simpler. When the country transitions from its usual tropical state to a dry season, the color of the hills radically changes from green to brown, hence this nomenclature. According to locals and geographers, these hills when they turn brown resemble pieces of chocolate as far as the eye can see.

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