·GEOLOGICAL ERA·

CENOZOIC

·DOMINANT FAUNA·

MAMMALS

·DOMINANT FLORA·

ANGIOSPERMS

angiosperm and iphone fossil human skull fossil bear skull fossil human femur fossil mammoth skull fossil

·GEOLOGICAL ERA·

MESOZOIC

·DOMINANT FAUNA·

DINOSAURS

·DOMINANT FLORA·

CONIFERS

t-rex fossil conifer fossil

·GEOLOGICAL ERA·

PALEOZOIC

·DOMINANT FAUNA·

FISH, ARTHROPODS,
AMPHIBIANS, & REPTILES

·DOMINANT FLORA·

ALGAE & FERNS

trilobite fossil fish fossil fern fossil turtle fossil

·GEOLOGICAL ERA·

PRECAMBRIAN

·DOMINANT FAUNA·

SINGLE-CELLED ORGANISMS

precambrian fossil precambrian fossil precambrian fossil