Geologic ErasOnline version Match the geologic eras by Veronica Leslie 1 PRECAMBRIAN 2 PALEOZOIC ERA 3 MESOZOIC ERA 4 CENOZOIC ERA FIRST ERA LONGEST ERA UNINHABITABLE CANADIAN SHIELD SECOND ERA NORTH AMERICA NEAR EQUATOR PANGAEA FORMED APPALACHIAN MOUNTAINS FORMED THIRD ERA DINOSAURS PANGAEA BROKE APART ROCKY AND INNUITIAN MOUNTAINS FORMED CURRENT ERA LAST ICE AGE HUMANS ON EARTH GLACIERS CARVED LAKES