Ninemile Shale Formation, Antelope Valley (Ordovician to of the United States)

Where: Nevada (39.0° N, 116.0° W: paleocoordinates 4.9° S, 84.5° W)

• coordinate estimated from map

• local area-level geographic resolution

When: Protopliomerella contracta - Pseudocybele nasuta zone, Ninemile Formation (Pogonip Group), Tulean to Tulean (480.8 - 470.0 Ma)

• Listed as Lower Arenig; zone G2 / zone J; Zone G2

• group of beds-level stratigraphic resolution

Environment/lithology: slope; lithified limestone and poorly lithified, calcareous shale

• Listed as upper slope, zone 5. Setting environment and taphofacies from Sprinkle and Guensberg, 1995
• Medium gray to olive-greenish-gray limestone with gray to bluish-green partings and interbeds of calcareous shale and highly argillaceous limestone

Size classes: macrofossils, mesofossils

Preservation: trace

Primary reference: C. W. Merriam. 1963. Paleozoic rocks of Antelope Valley, Eureka and Nye Counties, Nevada. United States Geological Survey Professional Paper 423:1-67 [P. Novack-Gottshall/P. Hearn/P. Wagner]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 77186: authorized by Phil Novack-Gottshall, entered by Paul Hearn on 28.12.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

• Common species; "no ostracodes or bryozoans have been recognized"
Show authors, comments, and common names
Cystoidea
  -
Cystoidea indet.
Cystoidea indet. von Buch 1846
Pterobranchia
 Graptoloidea - Dichograptidae
Didymograptus sp.
Didymograptus sp. McCoy 1851 graptolite
Lingulata
 Lingulida - Lingulidae
Lingula sp.
Lingula sp. Bruguiére 1797
Strophomenata
 Billingsellida - Polytoechiidae
Tritoechia sinuata
Tritoechia sinuata Ulrich and Cooper 1938
 Strophomenida - Taffiidae
Leptella nevadensis
Leptella nevadensis Ulrich and Cooper 1936
Rhynchonellata
 Pentamerida - Camerellidae
Rhynchocamara sublaevis, Rhynchocamara cf. breviplicata
 Pentamerida - Tetralobulidae
Syntrophopsis polita
 Orthida - Hesperonomiidae
Hesperonomia antelopensis
Hesperonomia antelopensis Ulrich and Cooper 1936
 Orthida - Archaeorthidae
Archaeorthis elongata
Archaeorthis elongata Ulrich and Cooper 1936
Cephalopoda
 Ellesmerocerida - Protocycloceratidae
"Protocycloceras foerstei" = Catoraphiceras foerstei
"Protocycloceras foerstei" = Catoraphiceras foerstei Butts 1926
Gastropoda
 Euomphalina - Macluritidae
Maclurites " indet. sp.1", Maclurites " indet. sp.2"
Maclurites " indet. sp.1" Le Sueur 1818 snail
Maclurites " indet. sp.2" Le Sueur 1818 snail
 Euomphalina - Raphistomatidae
"Raphistomina cf. latiumbilicata" = Ceratopea latiumbilicata
"Raphistomina cf. latiumbilicata" = Ceratopea latiumbilicata Poulsen 1927 snail
 Euomphalina - Lesueurillidae
Eccyliopterus sp.
Eccyliopterus sp. Remelé 1888 snail
 Euomphalina - Helicotomidae
Helicotoma sp.
Helicotoma sp. Salter 1859 snail
Artiopoda
 Agnostida - Agnostidae
Agnostus sp.
Agnostus sp. Brongniart 1822
Trilobita
 Corynexochida - Illaenidae
Illaenus sp.
Illaenus sp. Dalman 1827 trilobite
 Proetida - Bathyuridae
Petigurus sp.
Petigurus sp. Raymond 1913 trilobite
 Phacopida - Encrinuridae
Encrinuridae indet.
Encrinuridae indet. Angelin 1854 trilobite
 Phacopida - Pliomeridae
Pliomerops sp.
Pliomerops sp. Raymond 1905 trilobite
 Trinucleida - Raphiophoridae
Raphiophoridae indet.
Raphiophoridae indet. Angelin 1854 trilobite
 Asaphida - Asaphidae
"Kirkella vigilans" = Ptyocephalus, Isoteloides sp.
"Kirkella vigilans" = Ptyocephalus trilobite
Isoteloides sp. Raymond 1910 trilobite