Garth Bank, northeast (Silurian of the United Kingdom)

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

• fine blue-grey siltstone or muddy sandstone with rare sandy laminae. riddled with chondrites-type burrows. concretions up to 30 cm diam. rare pebbles usually of vein quartz.

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 8408: authorized by John Alroy, entered by Mike Sommers on 11.07.2000

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Anthozoa
 Rugosa -
Rugosa indet.
Rugosa indet. horn coral
solitary rugose coral
Crinoidea
  -
Crinoidea indet.
Crinoidea indet. Miller 1821 Sea lily
ossicles
unclassified
  -
Pelmatozoa indet.
Pelmatozoa indet. Leuckart 1848
pelmatozoan ossicles
Stenolaemata
 Trepostomata -
Trepostomata indet.
Trepostomata indet. Ulrich 1882
trepostome
Rhynchonellata
 Athyridida - Meristellidae
"Cryptothyrella angustifrons" = Hindella, "? Cryptothyrella sp." = Hindella
"Cryptothyrella angustifrons" = Hindella
"? Cryptothyrella sp." = Hindella Davidson 1882
 Atrypida - Cyclospiridae
Cyclospira sp.
Cyclospira sp. Hall and Clarke 1893
 Atrypida - Atrypinidae
Eospirigerina sp.
Eospirigerina sp. Schuchert and Cooper 1930
 Atrypida - Atrypidae
Plectatrypa sp.
Plectatrypa sp. Schuchert and Cooper 1930
 Atrypida - Lissatrypidae
Meifodia subundata
Meifodia subundata McCoy 1851
 Orthida - Dalmanellidae
Dalmanellidae indet., Resserella sp.
Dalmanellidae indet. Schuchert 1913
dalmanellid
Resserella sp. Bancroft 1928
 Orthida - Giraldiellidae
? Giraldiella sp.
? Giraldiella sp. Williams 1951
 Orthida - Hesperorthidae
Dolerorthis sp.
Dolerorthis sp. Schuchert and Cooper 1931
 Orthida -
"Orthacea indet." = Orthoidea
"Orthacea indet." = Orthoidea Woodward 1852
orthacean
 Protorthida - Skenidiidae
Skenidioides sp.
Skenidioides sp. Schuchert and Cooper 1931
 Pentamerida - Stricklandiidae
Stricklandia lens
Stricklandia lens Sowerby 1839
 Pentamerida - Pentameridae
Pentameridae indet.
Pentameridae indet. M'Coy 1844
pentamerid
 Rhynchonellida -
Rhynchonellida indet.
Rhynchonellida indet. Kuhn 1949
rhynchonellide
 Rhynchonellida - Trigonirhynchiidae
Plectothyrella crassicosta
Strophomenata
 Strophomenida - Sowerbyellidae
"Anisopleurella gracilis" = Kozlowskites gracilis, "Eoplectodonta undulata" = Eoplectodonta (Eoplectodonta) duplicata
"Anisopleurella gracilis" = Kozlowskites gracilis Jones 1928
"Eoplectodonta undulata" = Eoplectodonta (Eoplectodonta) duplicata de Sowerby and Murchison 1839
 Strophomenida - Leptestiidae
Leangella scissa
Leangella scissa Davidson 1871
 Strophomenida - Furcitellidae
Katastrophomena woodlandensis
 Strophomenida - Rafinesquinidae
Leptaena sp.
Leptaena sp. Dalman 1828
 Orthotetida - Triplesiidae
Streptis altosinuata
Streptis altosinuata Holtedahl 1916
Chileata
 Dictyonellida - Eichwaldiidae
"Dictyonella sp." = Eodictyonella
"Dictyonella sp." = Eodictyonella Wright 1994
Articulata
  -
Articulata indet.
Articulata indet.
articulate
Gastropoda
  -
Gastropoda indet.
Gastropoda indet. Cuvier 1795 snail
2x turbiniform indet., 1x gastropod indet.
 Bellerophontida -
"? Bellerophontacea indet." = Bellerophontoidea
"? Bellerophontacea indet." = Bellerophontoidea M'Coy 1851 snail
bellerophontacean
 Euomphalina - Oriostomatidae
? Oriostoma sp.
? Oriostoma sp. Munier-Chalmas 1876 snail
Trilobita
 Corynexochida - Illaenidae
? Illaenidae indet.
? Illaenidae indet. Hawle and Corda 1847 trilobite
illaenid