Fossil deposits are layers of sedimentary rock that contain preserved remains of ancient organisms, such as plants and animals. These deposits form over millions of years as sediments accumulate and bury the remains, protecting them from decay. Fossils can provide valuable information about the Earth's history, including past climates and ecosystems. The study of fossil deposits helps scientists, known as paleontologists, understand how life has evolved over time. By examining these fossils, researchers can identify different species, their habitats, and how they interacted with one another. This information is crucial for reconstructing the planet's biological and geological history.