Discoaster

Discoaster is a genus of fossil coccolithophores, which are single-celled marine algae. These organisms secrete microscopic plates of calcium carbonate, called coccoliths, that form their external skeleton. When these organisms die, their coccoliths can accumulate on the seafloor and become fossilized. The genus Discoaster is characterized by its distinctive star-shaped coccoliths, often with multiple rays. These fossils are important in biostratigraphy, a method of dating rocks based on their fossil content. The specific shapes and evolutionary lineages of Discoaster species allow paleontologists to correlate and date sedimentary rock layers, particularly those from the Cenozoic Era. Discoaster fossils are found in marine sediments worldwide and are particularly abundant in deposits from the Paleogene and Neogene periods. Their presence and distribution provide valuable insights into ancient ocean conditions, including temperature and circulation patterns. The study of Discoaster contributes to understanding past climate change and the evolution of marine life.