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
Lesser Known Heaven" on January 11, 2011 and "Rio" on February 17, 2011. Boeldt worked with Elena Johnston in creating what described as the "pretty ominous" cover art for "Lesser Known", whom Johnston chose the pictures and helped him put the chosen images together on the artwork. Reviews from music journalists upon release were generally mixed. Some reviewers disliked "Lesser Known" for having the same main problem as Adventure's debut album, that it only focused on recreating old music that was already easy to access both online and retro 1980s music stations without trying to cross over any boundaries or taking any