Carrizo Arroyo Unit 52: Virgilian, New Mexico

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Bivalvia - Cardiida - Kalenteridae
Permophorus aff. subcostatus (Meek and Worthen 1866)
1 specimen
Permophorus aff. oblongus (Meek and Hayden 1872)
40 specimens
Bivalvia - Ostreida - Pterineidae
Leptodesma (Leptodesma) welleri Sayre 1930
1 specimen
Bivalvia - Pectinida - Aviculopectinidae
Aviculopecten arctisulcatus Newell 1938
10 specimens
Bivalvia - Myalinida - Myalinidae
Myalinella aff. meeki (Dunbar 1924)
47 specimens
Gastropoda - Heterostropha - Donaldinidae
Donaldina stevensana (Meek and Worthen 1866)
1 specimen
Donaldina swallowiana (Geinitz 1866)
1 specimen
recombined as Royalella swallowiana
Gastropoda - Cycloneritida - Delphinulopsidae
Naticopsis (Marmolatella) cf. subovata (Meek and Worthen 1873)
32 specimens
recombined as Marmolatella subovata
Gastropoda - Orthonematidae
? Orthonema sp. Meek and Worthen 1862
16 specimens
Orthonema laluzense Kues 2004
36 specimens
Orthonema cortum n. sp. Kues 2004
43 specimens
Gastropoda - Goniasmatidae
Goniasma lasallensis (Worthen 1890)
1 specimen
recombined as Goniasma lasallense
Gastropoda - Meekospiridae
Girtyspira minuta (Stevens 1858)
1 specimen
Gastropoda - Cerithimorpha - Orthonemidae
Stegocoelia (Hypergonia) percostata (Girty 1939)
7 specimens
recombined as Hypergonia percostata
Carinanema kietzkei n. gen., n. sp. Kues 2004
1063 specimens
Gastropoda - Naticopsidae
Naticopsis (Naticopsis) sp. M'Coy 1844
104 specimens
Gastropoda - Murchisoniina - Soleniscidae
Soleniscus informal sp. 1 Meek and Worthen 1860
154 specimens
Lingulata - Lingulida - Lingulidae
Lingula carbonaria Shumard and Swallow 1858
6 specimens
see common names

Geography
Country:United States State/province:New Mexico County:Valencia
Coordinates: 35.8° North, 107.1° West (view map)
Paleocoordinates:0.6° North, 36.9° West
Geographic resolution:outcrop
Time
Period:Carboniferous Epoch:Pennsylvanian
Stage:Gzhelian 10 m.y. bin:Carboniferous 5
Key time interval:Virgilian
Age range of interval:303.70000 - 298.90000 m.y. ago
Stratigraphy
Formation:Red Tanks
Local section:Carrizo Arroyo Local bed:84 m
Local order:bottom to top
Stratigraphic resolution:group of beds
Stratigraphy comments: Fusulinid information provided in other papers, but only generally cited here.
Lithology and environment
Primary lithology:gray,green,red argillaceous "limestone"
Secondary lithology:gray poorly lithified "shale"
Lithology description: This unit consists of thin, interbedded limestones and shales, mainly gray to greenish gray in color, with some red coloration locally. The limestone beds are thin, highly argillaceous, with undulating bedding planes and a concretionary character locally. Fresh surfaces of the concretionary limestone are hard, gray, micritic to somewhat argillaceous, and incorporate bivalve steinkerns. The shale beds are locally very fissile, and bear minor amounts of carbon grains and tiny plant fragments, but lack the calcareous grit present in unit 51.
Environment:marine indet.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Reason for describing collection:taxonomic analysis
Museum repositories:UNM
Metadata
Database number:156709
Authorizer:P. Wagner Enterer:P. Wagner
Research group:marine invertebrate
Created:2014-05-28 23:16:26 Last modified:2014-05-28 23:16:26
Access level:the public Released:2014-05-28 23:16:26
Creative Commons license:CC BY
Reference information

Primary reference:
51368. B. S. Kues. 2004. Stratigraphy and brachiopod and molluscan paleontology of the Red Tanks Formation (Madera Group) near the Pennsylvanian–Permian boundary, Lucero uplift, west-central New Mexico. In S.G. Lucas, K.E. Zeigler (eds.), Carboniferous–Permian transition at Carrizo Arroyo, central New Mexico 25:143-210 [P. Wagner/P. Wagner]