Deep-sea Sediment Core Model main content.

Deep-sea Sediment Core Model

Part of Hall of Planet Earth.

Two sediment cores in the Hall of Planet Earth. Arrow points to the core on the left. AMNH/D. Finnin

Cariaco Basin, Venezuela, 15,000–12,000 years ago

The segment of sediment core modeled here shows 3,000 years of changing climate. The lowest gray-green layers were deposited during a cold period, when low sea levels cut off the basin from the open ocean. Dark layers represent a warm period when higher seas allowed nutrients to enter the basin, promoting plankton growth and producing dark silt. Light layers above record a shift 12,900 years ago to the cooler conditions of the Younger Dryas.

Courtesy of the International Ocean Discovery Program, 
JOIDES Resolution Science Operator