Plant Bed 8, Fern Ledges, Carleton, Saint John (Carboniferous of Canada)

Where: New Brunswick, Canada (45.2° N, 66.1° W: paleocoordinates 8.2° S, 8.9° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Lancaster Formation, Westphalian A (318.1 - 314.6 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 114459: authorized by Matthew Clapham, entered by Matthew Clapham on 15.08.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

Insecta
 Palaeodictyoptera - Homothetidae
Homothetus fossilis n. gen. n. sp.
Homothetus fossilis n. gen. n. sp. Scudder 1867 winged insect
 Palaeodictyoptera -
Dyscritus vetustus n. gen. n. sp.
Dyscritus vetustus n. gen. n. sp. Scudder 1880 winged insect
 Dicondylia -
Lithentomum harttii n. gen. n. sp.
Lithentomum harttii n. gen. n. sp. Scudder 1867 winged insect