Alcova Lake tracks [Morrison Fm.] (Jurassic to of the United States)

Where: Natrona County, Wyoming (42.5° N, 106.8° W: paleocoordinates 38.2° N, 52.7° W)

• coordinate based on nearby landmark

• local area-level geographic resolution

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

• member-level stratigraphic resolution

Environment/lithology: delta plain; gray, silty shale and lenticular, bioturbated sandstone

• "lower deltaic plain and/or channel splays"
• "In the Alcova region near Grey Reef Dam is a series of thin tabular and laminated beds of dark silty shale and immature sandstone. The tracks were made in these muddy sediments and subsequently filled in by overlying sand."

Size class: macrofossils

Preservation: cast, mold/impression, trace

Collection methods: surface (in situ),

Primary reference: M. V. Connely. 2006. Paleoecology of pterosaur tracks from the upper Sundance and lower Morrison formations in central Wyoming. In J. R. Foster, S. G. Lucas (eds.), Paleontology and Geology of the Upper Jurassic Morrison Formation, New Mexico Museum of Natural History and Science Bulletin 36:199-202 [R. Butler/R. Butler/M. Carrano]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 92105: authorized by Richard Butler, entered by Richard Butler on 30.10.2009, edited by Matthew Carrano

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Pterosauria - Pteraichnidae
Pteraichnus sp. Stokes 1957 pterosaur
 Dinosauria -
Dinosauria indet. Owen 1842 dinosaur
tridactyl tracks
 Saurischia -
Sauropoda indet. Marsh 1878 sauropod
 Ornithischia -
Ornithopoda indet. Marsh 1881 ornithopod
 Crocodylia -
? Crocodylia indet. Owen 1842 crocodilian