Fern Ledges, Plant bed 2, 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 (318.1 - 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 to be Langsettian (Westphalian A).

• 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 W.J. Wilson; reposited in the GSC

• Mr Wilson's collections have been made under exceptional circumstances. The beds from which Prof. Hartt had collected had been quarried to the level of the beach, and thus apparently exhausted. But Mr. Wilson, watching the beach after storms, was able to find some of the ledges bared by the action of the waves, and from these collected the objects herein described. He could work at these ledges only for a few hours when the tide was out.

Primary reference: G. F. Matthew. 1889. On some remarkable organisms of the Silurian and Devonian rocks in southern New Brunswick. Transactions of the Royal Society of Canada 6(4):49-62 [M. Clapham/M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 114468: authorized by Matthew Clapham, entered by Matthew Clapham on 15.08.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

Geracus tubifer
  -
Geracus tubifer n. gen. n. sp.3
Geracus tubifer n. gen. n. sp.3 Matthew 1897
NBMG 3012
Insecta
 Caloneurodea - Hapalopteridae
Geroneura wilsoni n. gen. n. sp.
Geroneura wilsoni n. gen. n. sp. Matthew 1889 winged insect
NBMG 3011 (GSC 8135)
 Megasecoptera -
Archaeoscolex corneus n. gen. n. sp.
Archaeoscolex corneus n. gen. n. sp. Matthew 1889 winged insect
NBMG 3008
Malacostraca
  -
Amphipeltis paradoxus2 Salter 1863
NBMG 3001
Arachnida
 Trigonotarbida - Anthracomartidae
Eurymartus latus n. gen. n. sp.2
Eurymartus latus n. gen. n. sp.2 Matthew 1895
NBMG 3003
 Trigonotarbida -
? Eurymartus spinulosus n. sp.2 Matthew 1895
NBMG 3004
  -
Podurites saltator n. gen. n. sp.2
Podurites saltator n. gen. n. sp.2 Matthew 1895
NBMG 3017
 Scorpiones - Palaeophonidae
Palaeophonus arctus n. sp.1 Matthew 1894 scorpion
Xiphosura
 Xiphosurida -
Eurypterella ornata n. gen. n. sp.
Eurypterella ornata n. gen. n. sp. Matthew 1889 eurypterid
NBMG 3002
Gastropoda
 Prosobranchia - Dendropupidae
"Pupa primaeva n. sp." = Dendropupa primaeva1
"Pupa primaeva n. sp." = Dendropupa primaeva1 Matthew 1894 snail
NBMG 3332