Angolan Oceanic Upwelling Community
Geologic period: Cretaceous
Cretaceous mosasaurs, sharks, ammonites, pterosaurs, fish and other animals from the South Atlantic, off the coast of what is now Angola.
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The underlying mechanisms driving the incredible marine productivity seen today in Angola was established early in the geological history of the coastal areas. Driven by coastal winds, currents from the ocean floor call upwellings brought cold nutrient-rich water to the surface, feeding plankton that is the foundation of the food chain. As it is today, the upwelling areas in the ancient sea were full of shellfish, sea urchins, snails, crabs and small fish, providing nutrition for larger fish and animals. High in the ancient food chain were the reigning predators of the time, the mosasaurs and plesiosaurs.