Geologic Time Crossword

these are the longest units of geologic time
eons are subdivided into smaller units of time called
eras are subdivided into
the extinction of many species on earth within a short period of time
connects two continents that were previously separated
The separation of a population of organisms from the rest of its species due to some physical barrier such as a mountain range or an ocean
The oldest era of the Phanerozoic eon
The middle era of the Phanerozoic eon
The youngest era of the Phanerozoic eon
A body of water formed when ocean water floods continents
In oxygen poor environment where overtime plant material changes into Kohls
In accident landmass with separated into present day
Are dominant Mesozoic land bird breeds that walked with legs positions directly below their hips
Where Mesozoic marine reptiles with small heads long necks and flippers
Were Mesozoic flying reptiles with large fat like wings