Geologic Time - Enchanted Learning Software . 65-24 mya, Oligocene 38-24 mya, Starts with a minor extinction (36 mya). Many marine invertebrates (marine animals with mineralized shells: ..
GEOL 102 The Cenozoic Era IV: The Age of Mammals . common as herbivores (including first open grassland grazers in Oligocene). Among smaller animals, also some grassland- related diversifications: ..
Palaeos Cenozoic: The Cenozoic Era An intro to the Cenozoic era, includes a review of each of the .. This led to the evolution of long-legged running animals adapted to life on the savanna ..
Geological Time & Paleobiology . Cenozoic Era (65 mya to today). Quaternary (1.8 mya to today) .. Oligocene (38 to 23 mya). Radiation of more modern animals: most modern bird forms ..
SDNHM - Geologic Time Line . [Skull of a small oreodont, an herbivorous animal that lived in Southern California during .. The climate is generally cooler than the Oligocene Epoch.
MSN Encarta - Paleontology . million to 55 million years ago) marks the beginning of the Cenozoic era. Two groups of animals that are now extinct flourished during the Oligocene ..