Radiolarians from the Hanson Creek Formation, Nevada: Caradoc, Nevada
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Protozoa
- Archaeospicularia
- Secuicollactidae
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Palaeosphaera micra n. gen., n. sp.
Renz 1990
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Protozoa
- Albaillellaria
- Ceratoikiscidae
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? Ceratoikiscum sp.
Deflandre 1953
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Protozoa
- Entactinaria
- Entactiniidae
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Entactinia spongia n. sp.
Renz 1990
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Protozoa
- Entactinaria
- Palaeoscenidiidae
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Palaeoephippium octaramosum n. sp.
Renz 1990
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Palaeotrifidus ballator n. gen., n. sp.
Renz 1990
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Palaeotrifidus imbifurcus n. gen., n. sp.
Renz 1990
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Protozoa
- Spumellaria
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Kalimnasphaera aff. maculosa
Webby and Blom 1986
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Geography
| Country: | United States | State/province: | Nevada | County: | Eureka |
| Coordinates: | 39.2° North, 116.4° West (view map) | ||||
| Paleocoordinates: | 2.1° North, 129.5° West (Wright 2013) | ||||
| Basis of coordinate: | based on nearby landmark |
Time
| Period: | Ordovician | Epoch: | Late Ordovician |
| 10 m.y. bin: | Ordovician 4-5 | ||
| *Period: | Late/Upper Ordovician | *Epoch: | Caradocian |
| Key time interval: | Caradoc | ||
| Age range of interval: | 458.2 - 449.5 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Formation: | Hanson Creek |
| Stratigraphic resolution: | formation |
Lithology and environment
| Primary lithology: | gray argillaceous lime mudstone |
| Includes fossils? | Y |
| Lithology description: Very dark gray fissile argillaceous limestone containing numerous crushed graptolites. Successive concretion seams are separated by variable thicknesses of dark gray, grayish orange weathering, platy argillaceous limestone. Lithology taken from Dunham & Murphy, 1976. | |
| Environment: | basinal (carbonate) |
| Geology comments: Environments from S. Holland. | |
Taphonomy
| Modes of preservation: | replaced with dolomite |
| Size of fossils: | microfossils |
Collection methods and comments
| Collection methods: | chemical,survey of museum collection |
| Reason for describing collection: | biostratigraphic analysis |
Metadata
| Database number: | 13498 | ||
| Authorizer: | S. Holland | Enterer: | T. Hanson |
| Modifier: | S. Holland | Research group: | micropaleontology |
| Created: | 2002-04-07 15:14:23 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2002-04-07 15:14:23 |
| Creative Commons license: | CC0 |
Reference information
Primary reference:
| 6114. | G. W. Renz. 1990. Late Ordovician (Caradocian) radiolarians from Nevada. Micropaleontology 36(4):367-377 [S. Holland/T. Hanson/T. Hanson] |