ammonites
barn in Glyn Ceiriog (Ordovician of the United Kingdom)

Where: Wales, United Kingdom (52.9° N, 3.2° W: paleocoordinates 44.7° S, 17.0° W)

• coordinate based on nearby landmark

• hand sample-level geographic resolution

When: Bryn Siltstone Formation, Longvillian (457.5 - 455.8 Ma)

• probably from the Caradoc Teirw Siltstone or Bryn Siltstone

• formation-level stratigraphic resolution

Environment/lithology: shallow subtidal; lithified siltstone

• The Caradoc succession in Glyn Ceiriog consists of a sequence of shallow-shelf sedimentary rocks interbedded with volcaniclastics, attributed to the Soudleyan and Longvillian sub-stages.

Size class: macrofossils

Preservation: cast

Primary reference: J. P. Botting, P. Appleton, L. A. Muir, J. Malpas, and K. Riddington. 2011. A new species of Siluraster (Echinodermata: Asteroidea) from the Late Ordovician of North Wales. Geological Journal 46:427-433 [L. Villier/L. Villier] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 128237: authorized by Loic Villier, entered by Loic Villier on 03.06.2012