Kasaan Island (Amoenospirifer-Gypidula? Community): Early/Lower Emsian, Alaska
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Anthozoa
- Favositida
- Favositidae
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Favosites sp.
Lamarck 1816
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Trilobita
- Phacopida
- Cheiruridae
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Cheirurus (Crotalocephalus) sp.
Beyrich 1845
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C. (Crotalocephalus) | ||||||||||
Strophomenata
- Strophomenida
- Amphistrophiidae
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Mesodouvillina (Mesodouvillina) sp.
Williams 1950
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2 specimens | |||||||||
M. (Mesodouvillina) | ||||||||||
Rhynchonellata
- Spiriferida
- Ambocoeliidae
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Crurithyris sp.
George 1931
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2 specimens | |||||||||
Rhynchonellata
- Spiriferida
- Adolfiidae
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Amoenospirifer angustiplicata
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295 specimens | |||||||||
Amoenospirifer sulcalplicata
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3 specimens | |||||||||
Rhynchonellata
- Spiriferida
- Delthyrididae
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Howellella nucula
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rare category | |||||||||
H. nucula alaskensis | ||||||||||
Rhynchonellata
- Spiriferinida
- Cyrtinidae
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Cyrtinaella undulata
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2 specimens | |||||||||
Rhynchonellata
- Rhynchonellida
- Trigonirhynchiidae
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Ancillotoechia antiquaria
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6 specimens | |||||||||
Rhynchonellata
- Rhynchonellida
- Aseptorhynchiidae
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Aseptirhynchia glabrata
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44 specimens | |||||||||
Rhynchonellata
- Rhynchonellida
- Pugnacidae
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Filigreenia circularis
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2 specimens | |||||||||
Rhynchonellata
- Rhynchonellida
- Plectorhynchellidae
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? Sibiritoechia sylvia
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2 specimens | |||||||||
originally entered as "? Sibiritoechia sylvia" | ||||||||||
Rhynchonellata
- Pentamerida
- Gypidulidae
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? Gypidula sp.
Hall 1867
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132 specimens | |||||||||
originally entered as "? Gypidula sp." | ||||||||||
Gypidula orbitatus
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rare category | |||||||||
originally entered as "Glypidula orbitatus" | ||||||||||
Rhynchonellata
- Atrypida
- Atrypidae
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Spinatrypa sp.
Stainbrook 1951
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19 specimens | |||||||||
Anatrypa (Desquamatia) aff. alinensis
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34 specimens | |||||||||
A. (Desquamatia) - originally entered as "Anatrypa aff. alinensis" | ||||||||||
Rostroconchia
- Conocardiida
- Conocardiidae
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Conocardium sp.
Bronn 1835
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Crinoidea
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Crinoidea indet.
Miller 1821
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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/Lower 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/Lower Emsian | Conodont zone: | gronbergi |
Age range of interval: | 409.10000 - 402.50000 m.y. ago | ||
* legacy (obsolete) database fields |
Stratigraphy
Stratigraphic resolution: | formation | ||||
Stratigraphy comments: section is 244.6 m |
Lithology and environment
Primary lithology: | "carbonate" |
Environment: | reef, buildup or bioherm |
Geology comments: "coquina-like deposits... micrite, coarse stromatoporoid debris, and fragmented, disarticulated brachiopods... shoal-water zone... [far] from the ancient shoreline... muddy, bioclastic substratum of a 'reef'-related, shallow shelf environment... biostromal or 'reefoid' banks of relatively low relief" |
Taphonomy
Modes of preservation: | body |
Collection methods and comments
Collection methods: | field collection |
Reason for describing collection: | paleoecologic analysis |
Taxonomic list comments:composite of five collections; abundance data only given for brachiopods; total number of specimens 543 |
Metadata
Also known as: | Reef 3272 | ||
Database number: | 3477 | ||
Authorizer: | J. Alroy | Enterer: | J. Alroy |
Modifier: | J. Alroy | Research group: | marine invertebrate |
Created: | 1999-08-02 15:45:09 | Last modified: | 2012-08-20 01:16:49 |
Access level: | the public | Released: | 1999-08-02 15:45:09 |
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] |