Cambrian Paleogeography What life forms were most abundant and diverse during this time period?
Devonian Paleogeography What life forms were most abundant and diverse during this time period?
Carboniferous Paleogeography What life forms were most abundant and diverse during this time period?
Permian Paleogeography What life forms were most abundant and diverse during this time period?
Triassic Paleogeography What life forms were most abundant and diverse during this time period?
Cenozoic Paleogeography What life forms were most abundant and diverse during this time period?