This period's early years saw the Sonoman and Marathon orogenies, while in later years the Sphenycodontia evolved to form early therapsids.
This period's early years saw the Sonoman and Marathon orogenies, while in later years the Sphenycodontia evolved to form early therapsids. Fusulinids and ammonoids are index fossils for this period, during which the development of the Tethys Ocean began. Euteryptids and trilobites became extinct during this period, and, during its Kungurian age, the super-continent Pangaea was formed. Fossil deposit sites from this period include a basin near Lubbock, Texas and a namesake region in the foothills of the Ural Mountains. For 10 points, name this final period of the Paleozoic that ended with the largest- known extinction event.
This period's early years saw the Sonoman and Marathon orogenies, while in later years the Sphenycodontia evolved to form early therapsids.
{Permian} period