The name of the rock layer containing fossil records is known as sedimentary rock. These layers form from the accumulation of sediments, such as minerals, organic matter, and debris, which are compacted and cemented over time. Fossils found in sedimentary rock provide crucial information about past life forms, environments, and evolutionary history. Different strata can indicate changes in climates, habitats, and biodiversity across geological time. Studying these records allows scientists to reconstruct past ecosystems and understand the dynamics of life on Earth, making sedimentary rock essential in paleontology and geology.