Phanerozoic Geologic History - Connection

66 million years ago to the present

250 - 201 million years ago

3.8 to 2.6 billion years ago

2.6 million years ago to the present

smaller than rodent sized

between medium sized rodents to dogs

between horse and elephant sized

human sized

no predation

only exoskeletons

small bodies

more than 3 pairs of legs

flowering plants and earthworms

crabs and snails

evergreens and scorpions

vascular plants and lungfish

spread quickly blanketing the Earth and raising the temperature

absorbed O2 which transformed the atmosphere to have more CO2

absorbed CO2 which cooled the Earth and caused a mass extinction

became food for the worms that lived underground

The breakup of Pangea

The Great Dying

The formation of the Rocky Mountains

The evolution of mammals

Antarctica moved over the South Pole.

The Rocky Mountains formed in North America.

The Atlantic Ocean was formed.

India collided with Asia creating a mountain range.

lungfish, mollusks, trilobites

lungfish, amphibians, reptiles

lungfish, arthropods, pterosaurs

lungfish, alligators, cattle