Where: Wales, United Kingdom (51.8° N, 3.6° W: paleocoordinates 37.0° S, 16.9° W)

• small collection-level geographic resolution

When: Rhuddanian (443.4 - 440.8 Ma)

• no formation name given. these horizons are biostrat comparable to A2-3 sequence of Llandovery.

• member-level stratigraphic resolution

Environment/lithology: offshore; lithified, burrowed, concretionary, argillaceous, sandy siltstone and sandstone

Primary reference: A. Williams and A. D. Wright. 1981. The Ordovician-Silurian boundary in the Garth area of southwest Powys, Wales. Geological Journal 16:1-39 [J. Alroy/M. Sommers/P. Wagner]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 8407: authorized by John Alroy, entered by Mike Sommers on 11.07.2000, edited by Pete Wagner

Creative Commons license: CC BY (attribution)