The base of this geological period's Bashkirian age is marked by the first appearance of the conodont species D. noduliferus.
The base of this geological period's Bashkirian age is marked by the first appearance of the conodont species D. noduliferus. One event in this period is a fifteen-million-year break in the fossil record that may have been caused by a drop in atmospheric oxygen levels, and is known as Romer's gap. This period also saw the emergence of the Uralian and Appalachian orogeny. The first amniotes evolved during this period, which also experienced an extinction event known as its namesake (*) Rainforest collapse. This period, which featured such massive species as a dragonfly with a two-foot wingspan is further divided in the Mississippian and Pennsylvanian. For 10 points, name this geological period that followed the Devonian Period and is known for its many coal-forming swamps.
The base of this geological period's Bashkirian age is marked by the first appearance of the conodont species D. noduliferus.
Carboniferous Period 