Raised Coral Terrace

Raised Coral Terrace is an original illustration set in South Pacific Raised-Reef Island. It lies in the tropics, where the climate is tropical rainforest — hot and wet all year.

A pale porous limestone cliff shows unmistakable fossil coral texture in its face. Two distinct horizontal terraces step above the present sea level, with knife-like solution pinnacles along their edges. Below, a narrow wave-cut platform meets warm shallow water.

Why is a coral reef standing high above the sea?

Coral only grows in the shallow sunlit zone at sea level, so a reef standing well above the waves means the land has risen — usually because it sits near a plate boundary being squeezed upward. Each terrace records a separate pause. The pinnacles are rainwater dissolving the limestone since it emerged. The whole island is essentially an old reef lifted into the air.

Terpano is a free daily geography puzzle. You study one original illustration, place a pin on a borderless terrain map, and see how close you were. There is no account and no sign-up; progress stays in your own browser. It plays in 11 languages.