sentences:  The formation reaches a total sedimentary thickness of more than .The formation ranges in age from the late Middle Jurassic to the early Early Cretaceous, Oxfordian to Hauterivian stages, with the base of the formation possibly extending into the Callovian.The Tendaguru Formation is subdivided into six members; from oldest to youngest Lower Dinosaur Member, the "Nerinella" Member, the Middle Dinosaur Member, "Indotrigonia africana" Member, the Upper Dinosaur Member, and the "Rutitrigonia bornhardti-schwarzi" Member.