Evans Peak (Carboniferous to of the United States)

Where: Colorado (38.3° N, 106.3° W: paleocoordinates 0.0° S, 37.0° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: "Weber" Formation, Bashkirian to Bashkirian (323.2 - 298.9 Ma)

• The names "Weber shales" and "Weber grits" were rejected by USGS

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; micaceous sandstone and micaceous shale

• the formation comprises a lower thin shaly division and a much thicker upper sandy and conglomeratic division, the two aggregating 1,000ft in the Leadville distict, but thickening to 2,800ft in adjacent regions. These are often spoken of as the "Weber shales" and "Weber grits". Thin beds of limestones containing invertebrates occur at several horizons. Both the shales and sandstones are highly micaceous.

Size classes: macrofossils, mesofossils

Primary reference: C. B. Read. 1934. A flora of Pottsville age from the Mosquito Range, Colorado. U.S. Geological Survey Prof. Paper 185-D:79-96 [H. Sims/S. Ostrowski/J. Cassara]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 11206: authorized by Hallie Sims, entered by Summer Ostrowski on 23.07.2001, edited by Alistair McGowan

Creative Commons license: CC BY (attribution)

Taxonomic list

 Radiatopses - Medullosaceae
 Trichopityales - Trichopityaceae
  - Sphenopteridae
  - Neuropteridae
 Hymenophyllales - Polypodiidae
Eusphenopteris sp. Weiss 1882
 Equisetales - Equisetidae
  - Polypodiaceae
 Cordaitales -
Cordaianthus sp. Grand'Eury 1877
 Lepidodendrales - Lepidodendraceae
Lepidodendron sp. Sternberg 1820
Dactylophyllum johnsoni n. gen. n. sp.
Dactylophyllum johnsoni n. gen. n. sp. Read 1934
Neuropteris gigantea
"Neuropteris ? gigantea" = Paripteris gigantea
"Neuropteris ? gigantea" = Paripteris gigantea Sternberg 1825
  - Cordaitaceae
Cordaicarpon sp. Geinitz 1862
almost certainly a new species
 Coniferales -
 Cordaitanthales -
Cordaites sp. Unger 1850
Neuropteris heterophylla
"Neuropteris heterophylla" = Imparipteris heterophylla
"Neuropteris heterophylla" = Imparipteris heterophylla Brongniart 1825