Where: United Kingdom (52.9° N, 3.8° W: paleocoordinates 73.2° S, 19.4° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Dictyonema graptolite zone, Dol-cyn-afon Member (Cwmhesgen Formation), Tremadocian (485.4 - 477.7 Ma)

• bed-level stratigraphic resolution

Environment/lithology: open shallow subtidal; lithified, black, gray, silty mudstone

Size class: macrofossils

Primary reference: A. W. A. Rushton. 1982. The biostratigraphy and correlation of Merioneth-Tremadoc Series boundary in North Wales. In M. G. Bassett, W. T. Dean (eds.), The Cambrian-Ordovician Boundary: Sections, fossil distributions, and correlations 3:41-60 [M. Hopkins/M. Hopkins]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 229519: authorized by Melanie Hopkins, entered by Melanie Hopkins on 14.03.2023

Creative Commons license: CC BY (attribution)