Rawtheyan "exotic" mudstone in East Flank of east of Wenallt #1 (Ordovician to of the United Kingdom)

Where: Wales, United Kingdom (51.8° N, 3.6° W: paleocoordinates 43.5° S, 17.3° W)

• small collection-level geographic resolution

When: Ooid Member, Cautleyan to Cautleyan (449.2 - 445.2 Ma)

• a single piece that is "foreign to the locality"

• member-level stratigraphic resolution

Environment/lithology: offshore; lithified, shelly/skeletal mudstone

• weathered fossiliferous mudstone

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 8389: authorized by John Alroy, entered by Mike Sommers on 10.07.2000, edited by Pete Wagner

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Pelmatozoa indet. Leuckart 1848
pelmatozoan ossicles
Gastropoda
  -
Gastropoda indet. Cuvier 1795 snail
7x trochiform micromorph, 1x smooth high spire micromorph
 Heterostropha - Donaldinidae
? Donaldina sp. Knight 1933 snail
 Bellerophontida -
"Bellerophontacea indet." = Bellerophontoidea
"Bellerophontacea indet." = Bellerophontoidea M'Coy 1851 snail
bellerophontacean
Bivalvia
 Nuculida - Praenuculidae
Praenucula sp. Pfab 1934 clam
Bryozoa
  -
Bryozoa indet. Ehrenberg 1831
Stenolaemata
 Cryptostomata -
Cryptostomata indet. Vine 1884
cryptostome
 Cryptostomata - Escharoporidae
Escharopora sp. Hall 1847
 Cryptostomata - Acanthocladiidae
 Trepostomata -
Trepostomata indet. Ulrich 1882
trepostome
Rhynchonellata
 Orthida - Dalmanellidae
Dalmanellidae indet. Schuchert 1913
dalmanellid
 Orthida -
"Orthacea indet." = Orthoidea
"Orthacea indet." = Orthoidea Woodward 1852
orthacean
 Atrypida - Atrypinidae
Eospirigerina sp. Schuchert and Cooper 1930
Strophomenata
 Strophomenida -
"Plectambonitacea indet." = Plectambonitoidea
"Plectambonitacea indet." = Plectambonitoidea Jones 1928
plectambonitacean
 Strophomenida - Leptestiidae
Leangella sp. Opik 1933
 Strophomenida - Sowerbyellidae
Eoplectodonta indet. Kozlowski 1929
 Billingsellida - Gonambonitidae
Kullervo grandis Cocks 2014
Polychaeta
  -
Machaeridia indet. scale worm
machaeridian