Shell Oil Co. Pine Field Nos. 1 and 43-22A, Deadwood Fm., Arenig, zones f and g,: Tulean, Montana
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Hexactinellida
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Hexactinellida indet.
Schmidt 1870
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Conodonta
- Protopanderodontida
- Protopanderodontidae
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Drepanodus sp.
Pander 1856
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| 9475'-9478' | ||||||||||
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Pterobranchia
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Graptolithina indet.
Bronn 1849
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Pterobranchia
- Graptoloidea
- Anisograptidae
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? Bryograptus sp.
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| originally entered as "? Bryograptus sp." | ||||||||||
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Eocrinoidea
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Eocrinoidea indet.
Jaekel 1918
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Xiphosura
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Merostomata indet.
Dana 1852
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Trilobita
- Phacopida
- Pliomeridae
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Protopliomerops sp.
Kobayashi 1934
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Trilobita
- Proetida
- Hystricuridae
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Hystricurus sp.
Raymond 1913
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= Hystricurus informal sp. A
Raymond 1913
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Lochman 1966 | |||||||||
| 9478'-9481' | ||||||||||
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Psalikilus sp.
Ross 1951
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= Psalikilus paraspinosum
Hintze 1953
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Lochman 1966 | |||||||||
| 9478'-9481' | ||||||||||
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Trilobita
- Proetida
- Bathyuridae
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Lichnocephala sp.
(Ross 1951)
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| originally entered as "Lidnocephala sp." | ||||||||||
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= Lichnocephala informal sp. A
Ross 1951
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Lochman 1966 | |||||||||
| 9478'-9481' (spelled "Licnocephala) | ||||||||||
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Peltabellia sp.
Whittington 1953
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= Peltabellia willistoni n. sp.
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Lochman 1966 | |||||||||
| 9475'-9478' | ||||||||||
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Trilobita
- Asaphida
- Asaphidae
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Aulacoparina sp.
(Hintze and Jaanusson 1956)
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= Aulacoparia (Aulacoparina) impressa n. sp.
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Lochman 1966 | |||||||||
| 9472'-9475', 9490-9493' | ||||||||||
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Megistaspis sp.
Jaanusson 1956
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Presbynileus sp.
Hintze 1954
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| 9478'-9481' | ||||||||||
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Ogyginus sp.
Raymond 1912
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Kayseraspis sp.
Harrington 1938
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Asaphellus sp.
Callaway 1877
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Megalaspidella sp.
Kobayashi 1937
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Ptychocephalus sp.
Agassiz 1843
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| originally entered as "Ptyclocephalus sp." | ||||||||||
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= Ptychocephalus montanensis n. sp.
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Lochman 1966 | |||||||||
| 9472'-9475', 9478'-9481' | ||||||||||
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Trilobita
- Asaphida
- Remopleurididae
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Apatokephalus sp.
Brögger 1896
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| 9478'-9481' | ||||||||||
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Trilobita
- Corynexochida
- Leiostegiidae
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Reubenella sp.
Lochmann 1966
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= Reubenella rex n. gen., n. sp.
Lochman 1966
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Lochman 1966 | |||||||||
| 9472'-9475' | ||||||||||
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Lloydia sp.
Vogdes 1893
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Lingulata
- Lingulida
- Obolidae
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Lingulella sp.
Salter 1866
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Strophomenata
- Strophomenida
- Taffiidae
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Leptella sp.
Hall and Clarke 1892
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Rhynchonellata
- Pentamerida
- Clarkellidae
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Syntrophina sp.
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Rhynchonellata
- Pentamerida
- Tetralobulidae
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Tetralobula sp.
Ulrich and Cooper 1936
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Rhynchonellata
- Orthida
- Plectorthidae
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Nanorthis sp.
Ulrich and Cooper 1936
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Gastropoda
- Euomphalina
- Holopeidae
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Raphistomina sp.
Ulrich and Scofield 1897
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Gastropoda
- Euomphalina
- Macluritidae
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Lecanospira sp.
Butts 1926
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= Lecanospira (Barnesella) aff. affinis
Billings 1865
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Lochman 1966 | |||||||||
| 9475' - 9478' and 9481'-9484' | ||||||||||
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Gastropoda
- Sinuopeidae
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Rhombella sp.
Bridge and Cloud 1947
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| 9475' - 9478' | ||||||||||
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= Rhombella cf. umbilicata
Dake and Bridge 1932
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Lochman 1966 | |||||||||
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Schizopea sp.
Butts 1926
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| 9484' - 9487' | ||||||||||
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Gastropoda
- Murchisoniina
- Hormotomidae
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Plethospira sp.
Ulrich and Scofield 1897
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| 9475' - 9478' | ||||||||||
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Hormotoma sp.
(Salter 1859)
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| originally entered as "? Murchisonia sp." | ||||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Montana |
| Coordinates: | 47.2° North, 110.2° West (view map) | ||
| Paleocoordinates: | 7.4° South, 75.6° West | ||
| Basis of coordinate: | based on political unit | ||
| Geographic resolution: | basin |
Time
| Period: | Ordovician | Epoch: | Early Ordovician |
| 10 m.y. bin: | Ordovician 1-2 | ||
| *Period: | Early/Lower Ordovician | *Epoch: | Late/Upper Arenig |
| Key time interval: | Tulean | Trilobite zone: | Hintzeia celsaora |
| Age range of interval: | 480.3 - 473.9 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
Lithology and environment
| Primary lithology: | "limestone" | ||
| Environment: | lagoonal | Tectonic setting: | passive margin |
| Geology comments: "sh, ls and congl., some ss. shelf lagoon, near shoreface. BA2. Cratonic shelf" | |||
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Reason for describing collection: | biostratigraphic analysis |
| Taxonomic list comments:"Lochman-Balk and Wilson 1967. biostrat. lists" | |
Metadata
| Database number: | 287 | ||
| Authorizer: | J. Sepkoski, P. Wagner | Enterer: | M. Sommers, P. Wagner |
| Modifier: | P. Wagner | Research group: | marine invertebrate |
| Created: | 1999-03-21 18:01:49 | Last modified: | 2020-06-17 14:20:38 |
| Access level: | the public | Released: | 1999-03-21 18:01:49 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 60989. | C. Lochman-Balk and J. L. Wilson. 1967. Stratigraphy of Upper Cambrian-Lower Ordovician Subsurface Sequence in Williston Basin. AAPG Bulletin 51(6):883-917 [M. Uhen/J. Ju] |
Secondary references:
| 13452 | C. Lochman. 1966. Lower Ordovician (Arenig) faunas from the Williston Basin, Montana and North Dakota. Journal of Paleontology 40(3):512-548 [P. Wagner/P. Wagner/P. Wagner] |