First given its name in an 1822 paper by William Conybeare and William Phillips, this period saw the replacement of lobe-fin fish with sharks as well as the development of the amniote egg, which led to the appearance of reptiles.
First given its name in an 1822 paper by William Conybeare and William Phillips, this period saw the replacement of lobe-fin fish with sharks as well as the development of the amniote egg, which led to the appearance of reptiles. The southern Appalachians were formed with the collision of Euramerica and Gondwanaland, and the lands were overgrown with trees and swamps, producing the largest abundance of oxygen ever in the atmosphere. In North America it is divided into the Pennsylvanian and Mississippian periods. FTP identify this geologic Period occurring 260-290 million years ago between the Devonian and Permian and named for its rich deposits of coal.
First given its name in an 1822 paper by William Conybeare and William Phillips, this period saw the replacement of lobe-fin fish with sharks as well as the development of the amniote egg, which led to the appearance of reptiles.
{Carboniferous} Period.