Archer City Formation
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The Archer City Formation is a geological formation in north-central Texas, preserving fossils from the Asselian and early Sakmarian stages of the Permian period. It is the earliest component of the T
Edaph boanerg 2
Ophiacodontidae Ophiacodon uniformis
Stereophallodon DB18
Bolosaurus DB15
Permian
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The Permian is a geologic period and stratigraphic system which spans 47 million years, from the end of the Carboniferous Period 298.9 Ma to the beginning of the Triassic Period 251.902 Ma. It is the
Selwyn Rock, South Australia, an exhumed glacial pavement of Permian age
Hercosestria cribrosa, a reef-forming productid brachiopod (Middle Permian, Glass Mountains, Texas)
Fossil and life restoration of Permocupes sojanensis, a permocupedid beetle from the Middle Permian of Russia
Edaphosaurus pogonias and Platyhystrix – Early Permian, North America and Europe