Garth Bank, Forestry track-road junction (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 8409: 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
Hormogoneae
 Oscillatoriales - Girvanellaceae
Girvanella sp.
Girvanella sp. Nicholson and Etheridge 1878
Trilobita
 Phacopida - Encrinuridae
Encrinuridae indet.
Encrinuridae indet. Angelin 1854 trilobite
 Phacopida - Calymenidae
Calymenidae indet., Diacalymene sp.
Calymenidae indet. Milne-Edwards 1840 trilobite
Diacalymene sp. Kegel 1927 trilobite
Articulata
  -
Articulata indet.
Articulata indet.
articulate
Strophomenata
 Strophomenida - Furcitellidae
? Pentlandina sp.
? Pentlandina sp. Bancroft 1949
 Strophomenida - Rafinesquinidae
Leptaena sp., "Leptaena cf. valentia" = Leptaena (Leptaena) valentia
Leptaena sp. Dalman 1828
"Leptaena cf. valentia" = Leptaena (Leptaena) valentia Cocks 1968
 Strophomenida - Leptestiidae
Leangella scissa
Leangella scissa Davidson 1871
 Strophomenida - Sowerbyellidae
Eoplectodonta sp., "Eoplectodonta duplicata" = Eoplectodonta (Eoplectodonta) duplicata, "Eoplectodonta undulata" = Eoplectodonta (Eoplectodonta) duplicata, "Anisopleurella gracilis" = Kozlowskites gracilis
Eoplectodonta sp. Kozlowski 1929
"Eoplectodonta duplicata" = Eoplectodonta (Eoplectodonta) duplicata de Sowerby and Murchison 1839
"Eoplectodonta undulata" = Eoplectodonta (Eoplectodonta) duplicata de Sowerby and Murchison 1839
"Anisopleurella gracilis" = Kozlowskites gracilis Jones 1928
 Strophomenida -
"Plectambonitacea indet." = Plectambonitoidea
"Plectambonitacea indet." = Plectambonitoidea Jones 1928
plectambonitacean
 Orthotetida - Triplesiidae
Triplesia sp.
Triplesia sp. Hall 1859
Rhynchonellata
 Atrypida - Lissatrypidae
? Meifodia sp., Meifodia subundata
Meifodia subundata McCoy 1851
 Atrypida - Atrypinidae
Eospirigerina gaspeensis
Eospirigerina gaspeensis Schuchert and Cooper 1930
 Rhynchonellida - Rhynchotrematidae
? Rhynchotrema sp.
 Protorthida - Skenidiidae
Skenidioides cf. woodlandensis
 Orthida -
"Orthacea indet." = Orthoidea
"Orthacea indet." = Orthoidea Woodward 1852
orthacean
 Orthida - Saukrodictyidae
Saukrodictya sp.
Saukrodictya sp. Wright 1964
 Orthida - Dalmanellidae
Dalmanellidae indet., Resserella sp., Isorthis sp., "Resserella llandoveriana" = Levenea llandoveriana
Dalmanellidae indet. Schuchert 1913
dalmanellid
Resserella sp. Bancroft 1928
Isorthis sp. Kozlowski 1929
"Resserella llandoveriana" = Levenea llandoveriana Williams 1951
 Orthida - Dicoelosiidae
Dicoelosia sp., Dicoelosia cf. verneuiliana, Dicoelosia cf. indenta
Dicoelosia sp. King 1850
 Pentamerida - Clorindidae
"Clorinda undata" = Clorilamnulella undata
"Clorinda undata" = Clorilamnulella undata de Sowerby and Murchison 1839
 Pentamerida - Pentameridae
Pentamerus sp.
Pentamerus sp. Sowerby 1813
Bryozoa
  -
Bryozoa indet.
Bryozoa indet. Ehrenberg 1831
Stenolaemata
 Cryptostomata -
Cryptostomata indet.
Cryptostomata indet. Vine 1884
cryptostome
 Trepostomata -
Trepostomata indet.
Trepostomata indet. Ulrich 1882
trepostome
Hyolitha
  -
? Hyolitha indet.
? Hyolitha indet. Marek 1963
hyolith
unclassified
  -
Vertebrata indet.
Vertebrata indet. Lamarck 1801
fish scales
Graptolithina
  -
Graptolithina indet.
Graptolithina indet. graptolite
graptolite
Anthozoa
 Rugosa -
Rugosa indet.
Rugosa indet. horn coral
solitary rugose coral