Robertson Point, Grand Lake (Carboniferous of Canada)

Where: New Brunswick, Canada (45.9° N, 66.1° W: paleocoordinates 6.8° S, 7.6° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Sunbury Creek Formation, Westphalian C (314.6 - 309.8 Ma)

• The Sunbury Creek Formation has traditionally been considered to be allostratigraphically of Moscovian age (St. Peter and Johnson, 2009). With the lack of volcanic rocks or ash beds throughout these formations, samples were collected for palynology analysis. Grey-shale samples were collected from 14 m above the base of the measured section and were processed for palynomorph analysis. Duncan McLean and David Bodman (personal communication to Matthew R. Stimson, 2021) analysed for palynomorphs and determined the palynomorph assemblage at Roberson Point to belong to the Torispora biozone. The miospore assemblage was dominated by the palynomorph Calamospora spp. with subdominate palynomorphs of Florinites pumicosus and Punctatisporites spp. The age determination was based on the presence of the palynomorph Vestispora fenestrate and Thymospora pseudothiessenii?. The Robertson Point outcrop can be considered of earliest Moscovian age (i.e. early Westphalian C), which confirms previous age assessments of the Sunbury Creek Formation.

• bed-level stratigraphic resolution

Environment/lithology: coarse channel fill; lithified, brown sandstone

• This unit locally incises into the underlying conglomerates up to an additional 2.5 m that can be traced along the wave cut platform from the main fossil locality, past the odonate wing locality to the end of the outcrop to the west.
• Buff-coloured coarse to very fine sandstones that locally exhibit trough cross-bedding and sheet sandstone beds

Size class: macrofossils

Preservation: mold/impression

Collected by Rowan E. Norrad, Donald B. Norrad

• Repository: New Brunswick Museum (NBMG)

Primary reference: O. Béthoux, R. E. Norrad, M. R. Stimson, O. A. King, L. F. Allen, I. Deregnaucourt, S. J. Hinds, J. H. Lewis, and J. W. Schneider. 2021. A unique, large-sized stem Odonata (Insecta) found in the early Pennsylvanian of New Brunswick (Canada). Fossil Record 24:207-221 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 221100: authorized by Matthew Clapham, entered by Matthew Clapham on 04.07.2021

Creative Commons license: CC BY (attribution)

Taxonomic list

Insecta
 Dicondylia -
Brunellopteron norradi n. gen. n. sp.
Brunellopteron norradi n. gen. n. sp. Béthoux et al. 2021 winged insect
NBMG 21589