[5] Eastward-dipping limestones, sandstones, and mudstones of the Glen Rose Formation were deposited during the early Cretaceous Period approximately 113 million years ago along the shorelines of an ancient sea, and form the geological setting for the park area.

[4] Near Dinosaur Valley State Park, in the limestone deposits along the Paluxy River, "twin sets" of tracks were found in the Glen Rose Formation as early as 1908.

Biologist Massimo Pigliucci has noted that geologists in the 1980s "clearly demonstrated that no human being left those prints," but rather "they were in fact metatarsal dinosaur tracks, together with a few pure and simple fakes.

[8] Zana Douglas, the granddaughter of George Adams, explained that during the 1930s' Great Depression her grandfather and other residents of Glen Rose made money by making moonshine and selling "dinosaur fossils".

[8] The faux fossils brought $15 to $30 and when the supply ran low, they "just carved more, some with human footprints thrown in.