ammonites
Coral-Cryptalgal Comm., Upper Bringewood, Welsh Borderland (Silurian of the United Kingdom)

Where: United Kingdom (52.0° N, 3.0° W: paleocoordinates 25.0° S, 12.2° W)

• coordinate based on political unit

• basin-level geographic resolution

When: Upper Bringewood Formation, Gorstian (422.9 - 421.3 Ma)

• Present in the highest beds. Authors give age simply as Ludlow. Assignment to Gorstian based on correlation chart in ref. 6658.

• formation-level stratigraphic resolution

Environment/lithology: marine; shelly/skeletal grainstone

• corals suggest clear, agitated water alternating with periods of shallowing, possibly in tidal zone, accompanied by growth of algal mats...fossils all epibenthic...very shallow BA 3
• "Shallow channels filled with well-sorted bioclastic grainstone and biosparite are common features" General description for megafacies: "richly calcareous, characterized by shell banks, coralliferous limestones, limy wackestone and grainstone, all of shallow water origin."

Primary reference: A. H. B. Mohamad and E. V. Tucker. 1999. Upper Bringewood Beds: fossil communities. In A. J. Boucot and J. D. Lawson (eds.), Paleocommunities--a case study from the Silurian and Lower Devonian 395-398 [M. Foote/M. Foote/M. Foote] more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 23206: authorized by Michael Foote, entered by Michael Foote on 10.07.2002