Kasaan Island (Filigreenia Community): Early Emsian, Alaska
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Stromatoporoidea
- Amphiporida
- Amphiporidae
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Amphipora sp.
Schulz 1883
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| "abundant" | ||||||||||
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Ostracoda
- Leperditicopida
- Moelleritiidae
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? Moelleritia sp.
Abushik 1958
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| originally entered as "? Moelleritia sp." | ||||||||||
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Strophomenata
- Strophomenida
- Amphistrophiidae
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Mesodouvillina (Mesodouvillina) sp.
Williams 1950
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3 specimens | |||||||||
| M. (Mesodouvillina) | ||||||||||
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Rhynchonellata
- Pentamerida
- Gypidulidae
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Gypidula orbitatus
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1 specimen | |||||||||
| G. orbitatus terrenus | ||||||||||
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Rhynchonellata
- Athyridida
- Athyrididae
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Protathyris pacificana
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49 specimens | |||||||||
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Leptathyris borki
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2 specimens | |||||||||
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Rhynchonellata
- Spiriferida
- Reticulariidae
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? Eoreticularia sp. n. sp.
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2 specimens | |||||||||
| originally entered as "? Eoreticularia n. sp." | ||||||||||
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Rhynchonellata
- Atrypida
- Atrypidae
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Anatrypa (Desquamatia) aff. alinensis
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1 specimen | |||||||||
| A. (Desquamatia) - originally entered as "Anatrypa aff. alinensis" | ||||||||||
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Rhynchonellata
- Rhynchonellida
- Pugnacidae
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Filigreenia circularis
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215 specimens | |||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Alaska |
| Coordinates: | 55.5° North, 132.3° West (view map) | ||
| Paleocoordinates: | 18.4° South, 83.8° West | ||
| Geographic resolution: | outcrop |
Time
| Period: | Devonian | Epoch: | Early Devonian |
| Stage: | Emsian | 10 m.y. bin: | Devonian 2 |
| *Period: | Early/Lower Devonian | ||
| *International age/stage: | Middle Emsian | *Local age/stage: | Zlichovian |
| Key time interval: | Early Emsian | Conodont zone: | gronbergi |
| Age range of interval: | 407.6 - 398.3 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Stratigraphic resolution: | formation | ||||
| Stratigraphy comments: section is 244.6 m | |||||
Lithology and environment
| Primary lithology: | packstone |
| Environment: | shallow subtidal indet. |
| Geology comments: "very dark, dolomitic micritic packstones... restricted, relatively shallow-water environment... low oxygen concentrations... massive with no internal bedding structures... enclosed, retricted portions of a lagoon or shelf... B.A. 2, and possible B.A. 3, setting" | |
Taphonomy
| Modes of preservation: | body |
Collection methods and comments
| Collection methods: | field collection |
| Reason for describing collection: | paleoecologic analysis |
| Taxonomic list comments:composite of 11 collections; abundance data only given for brachiopods; total number of specimens 273 | |
Metadata
| Also known as: | Amphipora Community | ||
| Database number: | 3486 | ||
| Authorizer: | J. Alroy | Enterer: | J. Alroy |
| Modifier: | J. Alroy | Research group: | marine invertebrate |
| Created: | 1999-08-02 18:18:46 | Last modified: | 2012-08-20 01:16:49 |
| Access level: | the public | Released: | 1999-08-02 18:18:46 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 198. | C. M. Soja. 1988. Early Devonian benthic communities of the Alexander Terrane, southeastern Alaska. Lethaia 21:319-338 [J. Alroy/J. Alroy] |