USGS D365, 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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| see common names | |||||||
Geography
| Country: | Japan |
| Coordinates: | 24.5° North, 124.3° East (view map) |
| Paleocoordinates: | |
| Basis of coordinate: | estimated from map |
| 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-26-55 | ||||
| Regional section: | Ibaruma | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: 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-26-55 | ||
| Database number: | 41590 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy |
| Modifier: | A. Hendy | Research group: | marine invertebrate |
| Created: | 2004-07-17 17:35:41 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2004-07-17 17:35:41 |
| 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] |