Wood Bjerg tracksite, eastern shoulder (Triassic of Greenland)

Also known as area V, Jameson Land, Track Mountain

Where: Greenland (71.4° N, 22.6° W: paleocoordinates 46.9° N, 2.2° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Ørsted Dal Member (Fleming Fjord Formation), Alaunian (215.6 - 212.0 Ma)

• fossils at several levels within member; informally called the Carlsberg Fjord Beds and the Tait Bjerg Beds; middle Norian

• group of beds-level stratigraphic resolution

Environment/lithology: lacustrine; red, blue, silty, conglomeratic claystone and siltstone

• "an ephemeral to semi-perennial lake with annual and longer-term fluctuations in lake water"
• Carlsberg Fjord Beds: "cyclic, bedded claystones or silty claystones and thin sandstones. This unit is also characterized by a well-developed composite cyclicity...The dominant facies in the cycles is red or violet claystone, or silty claystone with horizontal lamination. Commonly violet claystones are overlain by more silty, redbrown claystones. These claystones contain sandstone laminae, thin paleosols, and some infraformational conglomerates with bone fragments...The sandstones...are characterized by small-scale, wave-formed or current-formed cross-lamination and more rarely large-scale, current-formed cross-lamination. Upper bedding planes frequently contain dessication features, wave ripple marks, and dinosaur tracks."

•Tait Bjerg Beds: "The beds are composed of cyclically bedded, dark, clastic mudstones and lightgrey or yellowish, impure limestones or dolomitic limestones and clastic sandstones."

•Track-bearing bed: "thin, laterally extensive siltstone bed that is under- and over- lain by red mudstone. The siltstone bed has a thickness between 1 and 5 cm, is multistorey and contains wave-formed structures including even lamination and tiny wave ripples. The upper surface is cut by polygonal mudcracks and reveals micro-ridges of uncertain origin"

Size class: macrofossils

Preservation: mold/impression, trace

Collected by F. Jenkins, L. Clemmensen in 1990s, 2012

Collection methods: surface (in situ),

Primary reference: F. A. Jenkins, N. H. Shubin, W. W. Amaral, S. M. Gatesy, C. R. Schaff, L. B. Clemmensen, W. R. Downs, A. R. Davidson, N. Bonde and F. Osbaeck. 1994. Late Triassic continental vertebrates and depositional environments of the Fleming Fjord Formation, Jameson Land, East Greenland. Meddelelser om Grønland, Geoscience 32:1-25 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 27008: authorized by Matthew Carrano, entered by Matthew Carrano on 12.11.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Reptilia
 Theropoda -
Theropoda indet.
 Theropoda - Grallatoridae
Grallator sp.
Grallator sp. Hitchcock 1858 theropod
 Saurischia - Otozoidae
Evazoum sp.
Evazoum sp. Nicosia and Loi 2003 prosauropod
trackway S3
 Saurischia -
Eosauropus sp.
Eosauropus sp. Lockley et al. 2006 sauropodomorph
trackways S1, S2