Fossil Preservation Fossilization Processes Floods and Avalanches Fossilization Marine Sediments Geological Remnants Paleontology Fossil Sites Meteorite Impacts L Chondrites Meteorite Studies Cap Carbonates Mineralogy Microstratigraphy Pleistocene Deposits Rock Analysis Burrow Collapse Volcanic Ash Martian Sediments Deep-Sea Sediments Limestone Sediment Cores Coastal Geology Coastal Deposits Beach Deposits Sedimentary Deposits Foreshore Deposits Water History Ancient Water Sources Paleo Shorelines River Channel Changes Sedimentary Rock Gediz Vallis Channel