Calcareous Nannofossils

Calcareous nannofossils are tiny, microscopic marine organisms that have calcium carbonate shells. They lived in the oceans millions of years ago and are a significant part of the Earth's geological history. When these organisms died, their shells accumulated on the seabed and eventually became part of sedimentary rocks. Scientists study nannofossils to learn about ancient climates, ocean environments, and the evolution of life on Earth. Their presence in rock layers can also help determine the age of the rocks, making them valuable for both geological research and oil exploration.