THE tract of Devonian rocks which stretches through the north of France and Belgium, and across Rhenish Prussia into Westphalia and Nassau, has furnished ample materials for geological disquisition.

Red-colored sediments, generated when North America collided with Europe, give the Devonian its name, as these distinguishing rocks were first studied in Devon, England. The Devonian, part of the ...

Elias Range, and Talkeetna Mountains Physical sedimentology and stratigraphy of sedimentary strata in Alaska, Arizona, and Pennsylvania, including recent studies on fossil eurypterid-bearing Silurian ...

Now, the discovery of an older species, Palaeospondylus australis, from Early Devonian rocks in Australia sheds new light on this ancient genus. First described in 1890, Palaeospondylus gunni was ...