Thomas Farm Site Torreya Formation Gadsden County, Florida paleontological sites Alachua Formation Leon County, Florida paleontological sites List of the Cenozoic life of South Dakota List of the Cenozoic life of Nebraska List of the Cenozoic life of Texas List of the Cenozoic life of California List of the Cenozoic life of Florida List of the Cenozoic life of Colorado Cucaracha Formation John Day Formation Sharps Formation 2015 in paleomammalogy