Hn4151 - Miyako area [Hiraiga Fm]: Late/Upper Aptian, Japan
collected by Hanai & Kase
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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unclassified
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Valdedolsella akushaensis
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Cephalopoda
- Ammonitida
- Douvilleiceratidae
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Eodouvilleiceras matsumotoi
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Gastropoda
- Heterostropha
- Acteonidae
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? Acteon sp.
Montfort 1810
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Gastropoda
- Heterostropha
- Ringiculidae
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Eriptycha minima
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Gastropoda
- Cirridae
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Shikamacirrus nipponicus n. gen., n. sp.
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Gastropoda
- Turbinidae
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Afrollonia matsushimensis n. sp.
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Bivalvia
- Trigoniida
- Megatrigoniidae
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Pterotrigonia yokoyamai
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Bivalvia
- Cardiida
- Veneridae
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Nagaoella corrugata
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Bivalvia
- Carditida
- Astartidae
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Astarte (Leckhamptonia) subomalioides
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Bivalvia
- Ostreida
- Bakevelliidae
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Bakevellia pseudorostrata
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| see common names | |||||||
Geography
| Country: | Japan |
| Coordinates: | 39.8° North, 142.0° East (view map) |
| Paleocoordinates: | 53.0° North, 141.0° East |
| Basis of coordinate: | based on nearby landmark |
| Geographic resolution: | outcrop |
Time
| Period: | Cretaceous | Epoch: | Early/Lower Cretaceous |
| 10 m.y. bin: | Cretaceous 2-3 | ||
| Key time interval: | Late/Upper Aptian | ||
| Age range of interval: | 119.50000 - 113.00000 m.y. ago |
Stratigraphy
| Formation: | Hiraiga | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: STRATIGRAPHIC RELATIONS: From the Hiraiga Fm. AGE: Late Aptian; justification for age not reported in text. STRATIGRAPHIC POSITION: From the lower part within the Hiraiga Fm. | |||||
Lithology and environment
| Primary lithology: | fine,nodular lithified calcareous,carbonaceous sandstone |
| Includes fossils? | Y |
| Lithology description: SPECIFIC LITHOLOGY: Calcareous fine-grained sandstone including cobble- to boulder-sized nodules; nodules consist of varicolored calcareous fine-grained sandstone with carbonized plant fragments and small-sized bivalves, gastropods, and ammonites. LITHIFICATION: Lithified, on the basis of figured specimens. | |
| Environment: | marine indet. |
Taphonomy
| Modes of preservation: | body,concretion |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | field collection |
| Reason for describing collection: | taxonomic analysis |
| Collectors: | Hanai & Kase |
| Collection method comments: COLLECTOR: T. Hanai and T. Kase. REPOSITORY: Not stated in text. | |
| Taxonomic list comments:COVERAGE: Exhaustive for gastropods; other taxa (namely bivalves and foraminifera) often present. NOMENCLATURE: Authoritative publication, with relatively modern nomenclature, and species-resolution identifications. | |
Metadata
| Database number: | 91303 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy | Research group: | marine invertebrate |
| Created: | 2009-09-14 12:18:47 | Last modified: | 2013-11-25 13:37:23 |
| Access level: | the public | Released: | 2009-09-14 12:18:47 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 30704. | T. Kase. 1984. Early Cretaceous marine and brackish-water Gastropoda from Japan 1-262 [A. Hendy/A. Hendy] |