Stratigraphy – Fossil Horses https://www.floridamuseum.ufl.edu/fossil-horses/stratigraphy/
Animal remains are most likely to be fossilized if their hard parts are covered by layers of sediments soon after death. With time and pressure, these sediments, such as sand, plant debris, or ash, become compressed into rock. Therefore, fossils are found in sedimentary rock, like sandstone, shale,
Fossil Horses Stratigraphy Layer by Layer Fossil Horses Online Exhibit Scientific