MY NAME IS ANDREW SWANK

GALLERY

WATCH

Water- Sea levels were high worldwide, and much of the land lay under shallow seas, where tropical reef organisms lived. The deep, enormous Panthalassa (the universal ocean) covered the rest of the planet. Other minor oceans were Paleo-Tethys, Proto-Tethys, Rheic Ocean, and Ural Ocean.

Mass extinction- The close of the Devonian Period is considered to be the second of the “big five” mass extinction events of Earth’s history. 70% of the invertebrate species died. Causes of the extinction are debated but may be related to cooling climate from CO2 depletion caused by the first forests.

Evidence of the Devonian period are the crab like fossils found today.