text: A sedimentary basin named for this period in western Texas has the world's thickest deposits dating from here.
full_question: A sedimentary basin named for this period in western Texas has the world's thickest deposits dating from here. Its latter part involved the upward rifting of the Cimmerian subcontinent, an event that formed the Neo-Tethys sea. Swamp-loving lycopod trees were gradually replaced in continental interiors by advanced species of seed ferns and conifers in this period. Olson's extinction is a small event that occurred is in the middle of this period. By the end of this period, dicynodonts and gorgonopsians dominated terrestrial fauna. The supercontinent Pangea existed throughout this period, which the Siberian traps may have ended. The Carboniferous period preceded, for 10 points, what last geologic period of the Paleozoic, which ended with a massive extinction event that ushered in the Triassic?
first_sentence: A sedimentary basin named for this period in western Texas has the world's thickest deposits dating from here.
raw_answer: Permian period