Plant Bed 2, Fern Ledges, Carleton, Saint John (Carboniferous of Canada)

Where: New Brunswick, Canada (45.2° N, 66.1° W: paleocoordinates 8.3° S, 8.4° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Lancaster Formation, Westphalian A (318.7 - 316.9 Ma)

• Plant fossils indicate an early Westphalian B age (Stopes, 1914; Hayes and Howell, 1937; Bell, 1944b) for the Lancaster Formation at Saint John, now considered mid-upper Langsettian (Falcon-Lang & Miller, 2007).

• group of beds-level stratigraphic resolution

Environment/lithology: estuary or bay; lithified shale

• Interpreted as a marsh or very shallow fresh water pond by Matthew (1894), but re-interpreted by Falcon-Lang and Miller (2007) as shoreline sediments in a brackish bay. Maritimes basin; major rift-valley system developed after the Acadian orogeny.
• In the type area, the formation consists of grey to greenish grey quartzose sandstone and dark grey, greenish grey, or black shale.

Size class: macrofossils

Preservation: mold/impression

Collected by C.F. Hartt in 1862

Primary reference: J. W. Dawson. 1867. On some remains of Palaeozoic insects recently discovered in Nova Scotia and New Brunswick. The Canadian Naturalist 3:202-206 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 122728: authorized by Matthew Clapham, entered by Jered Karr on 05.01.2012, edited by Matthew Clapham

Creative Commons license: CC BY (attribution)

Taxonomic list

Bacillariophyceae
 Naviculales - Pinnulariaceae
unclassified
  -
Neuropteridae
  - Neuropteridae
Pteropsida
 Filicinae -
Pecopteris ingens, "Alethopteris discrepans" = Pecopteris (Alethopteris)
"Alethopteris discrepans" = Pecopteris (Alethopteris)
Pteridopsida
 Filicales -
Polypodiopsida
 Equisetales - Equisetidae
 Hymenophyllales - Polypodiidae
? Trichomanites sp. Goeppert 1836
 Radiatopses - Medullosaceae
Cardiocarpum
  -
Psilophytopsida
 Psilophytales - Psilophytaceae
Sphenopteridae
  - Sphenopteridae
Sporangites
  -
Insecta
 Dicondylia -
Gerephemera simplex n. gen. n. sp., Xenoneura antiquorum n. gen. n. sp.
Gerephemera simplex n. gen. n. sp. Scudder 1868 winged insect
Xenoneura antiquorum n. gen. n. sp. Scudder 1867 winged insect
Malacostraca
  -