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Morrison Formation dinosaur track review

Ben Creisler

A new online paper:

Martin G. Lockley, Richard T. McCrea & Lisa G. Buckley (2015)
A review of dinosaur track occurrences from the Morrison Formation in
the type area around Dinosaur Ridge
Palaeogeography, Palaeoclimatology, Palaeoecology (advance online publication)


New Morrison Formation dinosaur track reports from Dinosaur Ridge, Colorado
Dinosaur track erosion and rescue from Morrison Formation type section
Dinosaur Ridge
Review of Late Jurassic dinosaur tracks known from Morrison Formation
type section
Morrison Formation type section dinosaur tracks placed in regional context


Although the type section of the Morrison Formation, near Denver
Colorado, now also well-known as Dinosaur Ridge, has since 1877 been
world-famous as the source of iconic Late Jurassic dinosaurs like
Stegosaurus, Apatosaurus and Diplodocus, little detailed information
has been published on fossil footprints from the formation this area.
Late Jurassic (Morrison) footprints were not reported from the type
section at Dinosaur Ridge until the early1990s. Since then other
footprints have been reported, and their precise stratigraphic
occurrences documented. To date diagnostic examples of theropod,
sauropod and thyreophoran (stegosaur) tracks have been documented from
at least three different locations. The quality of preservation of
these tracks ranges from moderately good to quite poor. Nevertheless
more than 25 individual footprints, including some undertracks, have
been identified unequivocally, including several manus-pes sets of
quadrupedal trackmakers. The track assemblage are typical of many
small Morrison Formation ichnofaunas and are consistent with what is
known of the body fossil assemblages. The track assemblage is reviewed
and compared with summary data from the 64 Morrison Formation
tracksites currently known.