Biostratigraphic Units

Biostratigraphic units are divisions of Earth's rock layers based on the fossils they contain. These fossils serve as markers to identify and correlate specific periods of Earth's history, since certain organisms lived only during particular times. By analyzing these fossil zones, geologists can determine the relative age of rock layers and understand the sequence of past life and environmental changes. This method helps in mapping the Earth's history, matching rock layers across different regions, and exploring natural resources, making biostratigraphy a vital tool in geology and paleontology.