Pounding Mill Branch: Ashbyan, Virginia

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Tetradium syringoporoides
Ulrich
Ostracoda - Leperditicopida - Leperditiidae
Leperditia fabulites
subsp. pinguis Butts
Trilobita - Phacopida - Cheiruridae
Pseudosphaerexochus sp. (Schmidt 1881)
original and current combination Cheirurus (Pseudosphaerexochus)
Trilobita - Phacopida - Pterygometopidae
Calliops aff. gracilens
(Raymond)
Rostroconchia - Conocardiida
Conocardium sp. Bronn 1835
    = Conocardioidea indet. Miller 1889
Wagner 2023
Gastropoda - Murchisoniina - Lophospiridae
Lophospira aff. ampla Ulrich and Scofield 1897
Ulrich
    = Lophospiridae indet. Wenz 1938
Wagner 2023
Paupospira ampla is a Richmondian species.
aff. Lophospira centralis Ulrich and Scofield 1897
Ulrich
    = Lophospira aff. perangulata Hall 1847
Wagner 1999
Lophospira perangulata (Hall 1847)
(Hall)
Lophospira procera Ulrich and Scofield 1897
synonym of Lophospira milleri
Ulrich
Lophospira bicincta (Hall 1847)
synonym of Lophospira milleri
(Hall)
Gastropoda - Murchisoniina - Trochonematidae
Trochonema bellulum Ulrich and Scofield 1897
Ulrich
Gastropoda - Murchisoniina - Eotomariidae
Eotomaria canalifera Ulrich and Scofield 1897
Ulrich
Gastropoda - Euomphalina - Helicotomidae
aff. Helicotoma tennesseensis Safford 1869
Ulrich and Scofield
Helicotoma declivis Safford 1869
Ulrich
Ophiletina sublaxa Ulrich and Scofield 1897
subsp. depressa
Gastropoda - Euomphalina - Holopeidae
Raphistomina sp. Ulrich and Scofield 1897
Gastropoda - Bellerophontida - Bucaniidae
Bucania emmonsi Ulrich and Scofield 1897
recombined as Loxobucania emmonsi
Ulrich and Scofield
Phragmolites cf. triangularis (Ulrich and Scofield 1897)
(Ulrich and Scofield)
Bivalvia - Cyrtodontida - Cyrtodontidae
Cyrtodonta sp. Billings 1858
Cephalopoda - Oncocerida
Cyrtoceras sp.
Cephalopoda - Barrandeocerida - Plectoceratidae
Plectoceras bondi
(Safford)
Cephalopoda - Actinocerida - Gonioceratidae
Gonioceras sp. Hall 1847
Cephalopoda - Orthocerida - Kionoceratidae
Kionoceras sp. Hyatt 1884
Strophomenata - Strophomenida - Strophomenidae
Strophomena filitexta (Hall 1847)
(Hall)
Strophomena tenuitesta Willard 1928
recombined as Rhipidomena tenuitesta
Willard
Strophomenata - Strophomenida - Sowerbyellidae
Sowerbyella cf. negrita
(Willard)
Sowerbyella sp. Jones 1928
Strophomenata - Strophomenida - Syndielasmatidae
Sowerbyites sp. Teichert 1937
Rhynchonellata - Orthida - Plectorthidae
Mimella sp. Cooper 1930
Rhynchonellata - Orthida - Plaesiomyidae
Multicostella sp.
Coleolidae
Polylopia (Salterella) billingsi
(Safford)
see common names

Geography
Country:United States State/province:Virginia County:Tazewell
Coordinates: 37.1° North, 81.7° West (view map)
Paleocoordinates:29.5° South, 61.9° West
Basis of coordinate:estimated from map
Geographic resolution:outcrop
Time
Period:Ordovician Epoch:Late/Upper Ordovician
10 m.y. bin:Ordovician 4-5
Key time interval:Ashbyan
Age range of interval:457.00000 - 449.80000 m.y. ago
Stratigraphy
Formation:Cliffield Member:Peery Limestone
Stratigraphic resolution:member
Stratigraphy comments: Ashbyan
Lithology and environment
Primary lithology:black,gray argillaceous "limestone"
Includes fossils?Y
Lithology description: Dark bluish-gray to black fine-grained argillaceous limestone. Chert is abundant. Waxy seams of silty clay and streaks of waxy bituminous material project from weathered surfaces and give the rock a nodular appearance. One of its most distinctive features is the ash-gray weathering residue, in which many well-preserved ostracodes appear. Intercalated beds of calcilutyte are common near the top.
Environment:carbonate indet.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils,microfossils
Collection methods and comments
Collection methods:field collection
Reason for describing collection:biostratigraphic analysis
Metadata
Also known as:Cliffield Formation, Peery Limestone Member, Pounding Mill Branch
Database number:33546
Authorizer:S. Holland, P. Wagner Enterer:T. Hanson, P. Wagner
Modifier:P. Wagner Research group:marine invertebrate
Created:2003-08-02 16:34:36 Last modified:2019-08-08 13:35:50
Access level:the public Released:2003-08-02 16:34:36
Creative Commons license:CC BY
Reference information

Primary reference:
8880. B. N. Cooper and C. E. Prouty. 1943. Stratigraphy of the Lower Middle Ordovician of Tazewell County, Virginia. Bulletin of the Geological Society of America 54:819-886 [S. Holland/T. Hanson/T. Hanson]

Secondary references:

9128 P. J. Wagner. 1999. The utility of fossil data in phylogenetic analyses: a likelihood example using Ordovician-Silurian species of the Lophospiridae (Gastropoda: Murchisoniina). American Malacological Bulletin 15(1):1-31 [P. Wagner/P. Wagner/P. Wagner]
9042 P. J. Wagner. 2023. Paleozoic Gastropod, Rostroconch, Helcionelloid and Tergomyan Database (2006 - 2023). [P. Wagner/P. Wagner/P. Wagner]