sediment cores

Sediment cores are cylindrical samples taken from the bottom of lakes, oceans, or other bodies of water. They capture layers of sediment that have built up over time, each layer representing a different period in Earth's history. Scientists analyze these cores to study changes in climate, ecology, and even human activity. By examining the composition and thickness of the layers, researchers can reconstruct past environments, track pollution, and understand natural events like volcanic eruptions. Sediment cores provide valuable insights into both the Earth's past and help predict future changes.