Devonian trilobite diversity in the Ardennes

The Devonian of the Ardennes, and especially the Eifelian, is very rich in trilobites. During this period, the Ardennes were situated north of the closing Rheic Ocean, along the southern margin of the Old Red Continent. Gondwana, to which present-day Morocco belongs, was on the southside.

 Lower Devonian  Middle Devonian  Upper Devonian

The Ourthe river near Comblain-au-Pont, northeastern Belgium