After Keppie (2000). The Appalachian orogen of North America is divisible with some controversy into five tectonolithologic zones which range in age from Late Precambrian through the Early Paleozoic ...

The Late Paleozoic ice age has long been a climate enigma. Atmospheric CO₂ estimates for this period vary widely, and different reconstructions of the likely temperature vary by as much as 20°C.

Researchers from the Faculty of Science and Technology of the University of Coimbra (FCTUC) announced the discovery of a fossil in Anadia, in Portugal's Aveiro district, which corresponds to a new ...

The Devonian, part of the Paleozoic era, is otherwise known as the Age of Fishes, as it spawned a remarkable variety of fish. The most formidable of them were the armored placoderms, a group that ...