Minnekahta tracksite (Jurassic to of the United States)

Where: Fall River County, South Dakota (43.4° N, 103.7° W: paleocoordinates 38.6° N, 49.7° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Morrison Formation, Kimmeridgian to Kimmeridgian (157.3 - 145.0 Ma)

• found high in formation, 2.5 m below top, but age is unclear. Originally the "Atlantosaurus Beds".

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; sandstone and blue shale

• tracks as molds in sandstone, prints in blue shale below

Size class: macrofossils

Preservation: trace

Collected by H. F. Wells in 1898; reposited in the YPM

Collection methods: quarrying,

• Originally collected by H. F. Wells in 1898

Primary reference: O. C. Marsh. 1899. Footprints of Jurassic dinosaurs. American Journal of Science 7:227-232 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 36268: authorized by Matthew Carrano, entered by Matthew Carrano on 22.01.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Avetheropoda - Allosauridae
aff. Allosaurus sp. Marsh 1877 allosaurid
YPM 2140
 Neornithischia -
? Camptosaurus sp. Marsh 1885 bird foot dinosaur
YPM 2140