Apatosaurus "Apatosaurus" may have been more solitary than other Morrison Formation dinosaurs. Fossils of the genus have only been found in the upper levels of the formation. Those of "Apatosaurus ajax" are known exclusively from the upper Brushy Basin Member, about 152–151 mya. "A.louisae" fossils are rare, known only from one site in the upper Brushy Basin Member; they date to the late Kimmeridgian stage, about 151mya. Additional "Apatosaurus" remains are known from similarly aged or slightly younger rocks, but they have not been identified as any particular species, and thus may instead belong to "Brontosaurus". The Morrison Formation records a
The Known Lands Lands was begun by two "Dungeons & Dragons" roleplayers who met at university. Their goal was to create a persistent world in "Neverwinter Nights 2" which was as close as possible to pen-and-paper style roleplaying. This is accomplished by grouping characters into parties, which participate in weekly sessions run by a dungeon master (DM). According to sages, the collection of islands, called by their inhabitants simply The Known Lands, is in its Third Age of existence. In the three thousand years since whatever cataclysmic event destroyed the Second Age – a time period whose knowledge is all but lost –