Southwest North America 25 Ka Pleistocene
Southwest North America 5 Ma Miocene-Pliocene
Southwest North America 10 Ma Miocene
Southwest North America 15 Ma Miocene
Southwest North America 20 Ma Miocene
Southwest North America 30 Ma Oligocene
Southwest North America 50 Ma Eocene
Southwest North America 85 Ma Cretaceous (Late)
Southwest North America 100 Ma Cretaceous (Early)
Southwest North America 125 Ma Cretaceous (Early)
Southwest North America 150 Ma Jurassic (Late)
Southwest North America 185 Ma Jurassic (Early)
Southwest North America 215 Ma Triassic (Late)
Southwest North America 245 Ma Triassic (Early)
Southwest North America 280 Ma Early Permian
Southwest North America 312 Ma Pennsylvanian (Middle)
Southwest North America 340 Ma MIssissippian (MIddle)
Southwest North America 370 Ma Devonian (Late)
Southwest North America 430 Ma Silurian (Early)
Southwest North America 470 Ma Ordovician (Middle)
Southwest North America 525 Ma Cambrian (Early)
