D1991 CO. Meiklejohn mud-mound (Ordovician of the United States)

Also known as USGS D 1991 CO. Reef 2366

Where: Nye County, Nevada (36.9° N, 116.7° W: paleocoordinates 6.4° S, 82.4° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Orthidiella brachiopod zone, Antelope Valley Formation (Pogonip Group), Whiterockian (470.0 - 457.3 Ma)

• Lower Antelope Valley Limestone, 10 ft above base of the mud-mound, 78 ft above base of the formation, Orthidiella Zone, Early Whiterockian

• bed-level stratigraphic resolution

Environment/lithology: reef, buildup or bioherm; lithified wackestone

• 80 m thick and 300 m wide mud-mound in an outer ramp setting in relatively deep and cold water. Core of the mound with zebra limestone bands and stromatactis structures.
• highly fossiliferous pocket in the main mass of the mud-mound

Size class: macrofossils

Reposited in the USGS

Primary reference: R. J. Ross, Jr. 1972. Fossils from the Ordovician bioherm at Meiklejohn Peak, Nevada. United States Geological Survey Professional Paper 685 [S. Finnegan/S. Finnegan/U. Merkel]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 80054: authorized by Wolfgang Kiessling, entered by Uta Merkel on 02.04.2008, edited by Melanie Hopkins

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Conodonta
 Ozarkodinida -
Periodon ? aculeatus
Periodon ? aculeatus Hadding 1913 conodont
 Prioniodontida - Oistodontidae
Oistodus sp.
Oistodus sp. Pander 1856 conodont
 Prioniodontida - Balognathidae
? Tetraprioniodus sp.
? Tetraprioniodus sp. Lindstrom 1955 conodont
 Protopanderodontida - Protopanderodontidae
"Scolopodus varicostatus" = Protopanderodus insculptus, "Drepanodus" sp.
"Scolopodus varicostatus" = Protopanderodus insculptus Branson and Mehl 1933 conodont
"Drepanodus" sp. Pander 1856 conodont
  -
Scandodus sp., Scandodus unicostatus
Scandodus sp. Lindstrom 1955 conodont
Lingulata
 Siphonotretida - Siphonotretidae
Schizambon sp.
Schizambon sp. Walcott 1884
Strophomenata
 Strophomenida -
Plectambonitoidea indet.
Rhynchonellata
 Orthida - Archaeorthidae
Pleurorthis sp.
Pleurorthis sp. Cooper 1956
 Orthida - Orthidiellidae
? Orthidium aff. fimbriatum, ? Orthidiella sp.
? Orthidiella sp. Ulrich and Cooper 1936
 Pentamerida - Tetralobulidae
? Cuparius sp.
? Cuparius sp. Ross 1971
 Pentamerida - Camerellidae
Camerella "sp. 1", Idiostrophia conciliata, Idiostrophia nuda
Camerella "sp. 1" Billings 1859
Trilobita
 Corynexochida - Illaenidae
Illaenus ? oscitatus
Illaenus ? oscitatus Fortey 1980 trilobite
 Asaphida - Nileidae
? Peraspis sp., Nileus sp.
? Peraspis sp. Whittington 1965 trilobite
Nileus sp. Dalman 1827 trilobite
 Proetida - Bathyuridae
Punka caecata
Punka caecata Fortey 1980 trilobite
 Phacopida - Cheiruridae
Lehua aff. argus
Lehua aff. argus Whittington 1963 trilobite