USGS D360, Ishigaki-shima - MacNeil (1964): Middle Eocene, Japan
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Gastropoda
- Turritellidae
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Bivalvia
- Pectinida
- Anomiidae
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| see common names | |||||||
Geography
| Country: | Japan |
| Coordinates: | 24.5° North, 124.3° East (view map) |
| Paleocoordinates: | |
| Basis of coordinate: | based on nearby landmark |
| Geographic resolution: | outcrop |
Time
| Period: | Paleogene | Epoch: | Eocene |
| 10 m.y. bin: | Cenozoic 2-3 | ||
| Key time interval: | Middle Eocene | ||
| Age range of interval: | 48.07 - 37.71 m.y. ago |
Stratigraphy
| Formation: | Miyara | ||||
| Local section: | Is-DF-21-55 | ||||
| Regional section: | Ibaruma | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: The conglomerate is estimated to be about 20 ft thick. Conglomerate bed in bedded volcanics. The Miyara Formation rests on the eerosional surface of an intensely folded Paleozoic formation, and is overlain by the Miocene Yaeyama coal-bearing group. Foraminifera support an upper Eocene age, while molluscs confirm a middle Miocene age | |||||
Lithology and environment
| Primary lithology: | pebbly,gray,green argillaceous,sandy,calcareous conglomerate |
| Includes fossils? | Y |
| Lithology description: Conglomerate of subrounded to rounded pebbles derived from the Ishigaki Group embedded in a gray, greenish-gray, reddish-brown or tan sandy, clayey, or limey matrix | |
| Environment: | coastal indet. |
Taphonomy
| Modes of preservation: | body,original aragonite,original calcite |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection excludes: | some microfossils |
| Collection methods: | selective quarrying,field collection |
| Reason for describing collection: | taxonomic analysis |
| Museum repositories: | USNM |
| Collection method comments: Collected by H.L. (1955). Reposited in the USGS of USNM collections | |
| Taxonomic list comments:Representative for mollusca | |
Metadata
| Also known as: | Is-DF-21-55 | ||
| Database number: | 41591 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy |
| Modifier: | A. Hendy | Research group: | marine invertebrate |
| Created: | 2004-07-17 17:37:56 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2004-07-17 17:37:56 |
| Creative Commons license: | CC0 | ||
Reference information
Primary reference:
| 11143. | F.S. MacNeil. 1964. Eocene megafossils from Ishigaki-shima Ryukyu-retto. United States Geological Survey Professional Paper 399(B):1-14 [A. Miller/A. Hendy/A. Hendy] |