- Paleozoic Era
Addresses the stratigraphy, ancient life, tectonics, and localities of formations and outcroppings.
www.ucmp.berkeley.edu/paleozoic/paleozoic.html
- GONIAT: Paleozoic Ammonoid Database System
Designed as a tool for investigations of the Paleozoic ammonoids, their paleogeographic distribution, and their biostratigraphic range.
www.uni-tuebingen.de/geo/gpi/mitarbeiter/kullmann/seiten/goniaten.html
- Paleozoic Era: The Age of Ancient Life
Comprised of six periods, it lasted from 570 to 250 million years ago.
www.kheper.auz.com/gaia/Paleozoic/Paleozoic.htm
- Paleozoic Extinctions
Highlights the major episodes, describes the geological settings, and lists the primary species affected.
www.anselm.edu/homepage/jpitocch/paleoext.html
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