may have been involved in its formation. A period of erosion and flattening began around 56 million years ago. During the Paleocene and Eocene, a carbonate platform (mostly red algae) supported an atoll, or an atoll-like structure with reefs. The platform sank below sea level roughly 46–50 million years ago during the Eocene, perhaps because the equatorial area it moved through was too hot or nutrient-rich to support the growth of a coral reef. Thermal subsidence lowered the drowned seamount to its present depth. (Full article…)
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