Locality 17 (Echinodiscus assemblage) - Shimonoseki City (Ashiya Gp): Late/Upper Oligocene, Japan
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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unclassified
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Antilophos fusiforme
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r category | ||||||
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Echinoidea
- Clypeasteroida
- Astriclypeidae
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Echinodiscus chikuzenensis
Nagao 1928
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a category | ||||||
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Gastropoda
- Naticidae
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Euspira ashiyaensis
Nagao 1928
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r category | ||||||
| synonym of Euspira meisensis | |||||||
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Gastropoda
- Neogastropoda
- Buccinidae
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Siphonalia shojii
Hirayama 1956
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r category | ||||||
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Bivalvia
- Arcida
- Glycymerididae
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Glycymeris (Veletuceta) cisshuensis
Makiyama 1926
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f category | ||||||
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Bivalvia
- Cardiida
- Veneridae
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Dosinia (Phacosoma) chikuzenensis
Nagao 1928
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r category | ||||||
| synonym of Dosinia nomurai | |||||||
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Meretrix hikoshimensis
Okamoto and Sakai 1995
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a category | ||||||
| see common names | |||||||
Geography
| Country: | Japan | State/province: | Yamaguchi |
| Coordinates: | 34.0° North, 130.9° East (view map) | ||
| Paleocoordinates: | 39.2° North, 127.4° East | ||
| Basis of coordinate: | based on nearby landmark | ||
| Geographic resolution: | outcrop |
Time
| Period: | Paleogene | Epoch: | Oligocene |
| Stage: | Chattian | 10 m.y. bin: | Cenozoic 4 |
| Key time interval: | Late/Upper Oligocene | ||
| Age range of interval: | 27.82000 - 23.03000 m.y. ago |
Stratigraphy
| Geological group: | Ashiya | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: No stratigraphic data available as manuscript is in Japanese. | |||||
Lithology and environment
| Primary lithology: | medium sandstone |
| Includes fossils? | Y |
| Lithology description: SPECIFIC: medium sandstone. GENERAL: The Ashiya Group is characterised by a sandstone-dominant shallw marine sequence (about 150 m thick), in which sedimentary facies include cross-stratified sandstone, parallel stratified sandstone, bioturbated sandstone, and sandstone/siltstone couplet facies. | |
| Environment: | coastal indet. |
| Geology comments: Sedimentary facies and molluscan assemblages suggest an environment in the upper euneritic zone of a temperate to subtropical sea. From Echinodiscus assemblage | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
| Preservation of anatomical detail: | medium |
Collection methods and comments
| Collection methods: | bulk,selective quarrying,field collection |
| Reason for describing collection: | paleoecologic analysis |
| Collection method comments: No collection data available as manuscript is in Japanese. Material is reposited in the Dept of Earth and Planetary Sciences, Faculty of Science, Kyushu University, and in Shimonoseki City Archaeological Museum, Shimonoseki. | |
| Taxonomic list comments:Taxonomic list is exhaustive for mollusca and includes other groups (Penguins, Sharks etc). Nomenclature is of a high quality. | |
Metadata
| Also known as: | E, Locality 17 | ||
| Database number: | 51456 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy |
| Modifier: | A. Hendy | Research group: | marine invertebrate |
| Created: | 2005-06-05 12:37:20 | Last modified: | 2013-11-25 13:37:23 |
| Access level: | authorizer only | Released: | 2006-06-05 12:37:20 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 13684. | K. Okamoto and T. Sakai. 1995. Sedimentary facies and fossil molluscs of the Oligocene Ashiya Group in the Hikoshima Takenokojim and Nishiyama area, Shimonoseki City, Southwest Japan. Bulletin of the Mizunami Fossil Museum 22:19-50 [A. Miller/A. Hendy/A. Hendy] |