ocr: Geologic History Holocene 10,000 years ago to now - Paleocens Eocene Cenozoic 257 Miocens. Oligocene Tertiary 38, Pliocens. la Pleistocene 990 Cretaceous Mesozoie Jurrasic 2157 Triassic' LAs 286 *Permian: Late Paleozoic Carboniferous - 30 Devonian: 408, Silurian' 4501 Early Paleozoic 505 Ordovician Cambrian yu millions of years ago