Edinburgh Formation, Liberty Hall Facies (Ordovician of the United States)

Where: Virginia (38.0° N, 79.0° W: paleocoordinates 30.2° S, 59.3° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Baltoniodus gerdae conodont zone, Liberty Hall Member (Edinburg Formation), Turinian (457.3 - 453.8 Ma)

• Listed as Middle Caradoc. Local series age stated as M1-3

• formation-level stratigraphic resolution

Environment/lithology: offshore shelf; lithified, black limestone and poorly lithified, black shale

• Age is M1-3 (=upper two-thirds of Black Riveran) according to Holland Cincinnatian stratigraphy website. Shaw and Fortey designate this facies as lower slope
• Dense, black, medium to thick-bedded limestone intercalated with black graptolitic shale

Size classes: macrofossils, mesofossils

Primary reference: B. N. Cooper and G. A. Cooper. 1946. Lower Middle Ordovician stratigraphy of the Shenandoah Valley, Virginia. Geological Society America Bulletin 57:35-113 [P. Novack-Gottshall/P. Hearn/J. Ju]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 76336: authorized by Phil Novack-Gottshall, entered by Paul Hearn on 19.11.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

• Common species listed
Show authors, comments, and common names
Trilobita
 Corynexochida - Styginidae
"Bronteopsis gregaria" = Raymondaspis gregarius
"Bronteopsis gregaria" = Raymondaspis gregarius Raymond 1920 trilobite
 Phacopida - Pterygometopidae
Calliops cf. annulatus
Calliops cf. annulatus Raymond 1905 trilobite
 Asaphida - Asaphidae
"Homotelus cf. simplex" = Isotelus simplex
"Homotelus cf. simplex" = Isotelus simplex Raymond and Narraway 1910 trilobite
 Trinucleida - Dionididae
Dionide sp.
Dionide sp. Barrande 1847 trilobite
 Trinucleida - Raphiophoridae
Ampyxina sp., Ampyx sp.
Ampyxina sp. Ullrich 1922 trilobite
Ampyx sp. Dalman 1827 trilobite
Artiopoda
 Agnostida - Metagnostidae
"Arthrorhachis elspethi" = Trinodus elspethi
"Arthrorhachis elspethi" = Trinodus elspethi Raymond 1925
Rhynchonellata
 Orthida - Dalmanellidae
"Resserella cf. rogata" = Paucicrura rogata
"Resserella cf. rogata" = Paucicrura rogata Sardeson 1892
Strophomenata
 Strophomenida - Sowerbyellidae
Ptychoglyptus virginiensis
 Rhombifera - Echinosphaeritidae
Echinosphaerites sp.
Echinosphaerites sp. Wahlenberg 1818
Pterobranchia
 Graptoloidea - Diplograptidae
Diplograptus sp.
Diplograptus sp. graptolite
 Graptoloidea - Climacograptidae
Climacograptus sp.
Climacograptus sp. Hall 1865 climacograptid
 Graptoloidea - Dicranograptidae
Nemagraptus sp.
Nemagraptus sp. graptolite