Junction of Everly Creek and Fontanelle Creek (Cretaceous of the United States)

Where: Wyoming (42.1° N, 110.5° W: paleocoordinates 43.1° N, 71.4° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Aspen Shale Formation, Cenomanian (100.5 - 93.9 Ma)

• "flora occur in deposits which directily underlie the Frontier Formation of accepted Colorado age"

•JA: the Aspen Shale is late Albian and immediately underlies the terrestrial Cenomanian and Turoninan Frontier Formation but is entirely marine and has a disputed upper boundary (Nichols and Jacobson 1982), so the flora is presumably from low in the Frontier Formation and therefore Cenomanian contra Brown

• formation-level stratigraphic resolution

Environment/lithology: fluvial-lacustrine; lithified, gray mudstone

• "thin stratum of bluish-gray hard mudstone, which is very brittle and fractures conchoidally"

Size class: macrofossils

Preservation: adpression, original carbon

Collection methods: bulk,

Primary reference: R. Brown. 1933. Fossil plants from the Aspen Shale of southwestern Wyoming. Proceedings of the United States National Museum 82(12):1-10 [B. Tiffney/J. Fosdick/J. Fosdick]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 34972: authorized by Bruce Tiffney, entered by Julia Fosdick on 21.10.2003

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Monocotyledoneae
 Typhales - Commelinidae
Sparganium aspensis n. sp.
spike of staminate flowers
Pteridopsida
 Schizaeales - Schizaeaceae
  -
 Polypodiales - Aspleniaceae
Magnoliopsida
 Magnoliales - Lauraceae
Laurus aspensis n. sp. laurel
Sassafras bradleyi n. sp. sassafras
 Saxifragales - Hamamelidaceae
Liquidambar fontanella n. sp. sweetgum
 Rosales - Rosaceae
Prunus aspensis n. sp. plum
 Proteales -
 Proteales - Nelumbonaceae
Nelumbo weymouthi n. sp.
originally entered as Nolumbo weymouthi
 Violales - Salicaceae
? Populus aspensis n. sp. poplar