USGS 17482, Chinen-misaki (FSM 28): Calabrian, Japan
collected by F. Stearns MacNeil
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Rhynchonellata
- Terebratulida
- Frenulinidae
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Jolonica ryukyuensis
Yabe and Hatai 1935
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| see common names | |||||||
Geography
| Country: | Japan | State/province: | Okinawa |
| Coordinates: | 26.2° North, 127.8° East (view map) | ||
| Paleocoordinates: | |||
| Basis of coordinate: | estimated from map | ||
| Geographic resolution: | outcrop |
Time
| Period: | Quaternary | Epoch: | Pleistocene |
| Stage: | Calabrian | 10 m.y. bin: | Cenozoic 6 |
| Key time interval: | Calabrian | ||
| Age range of interval: | 1.8 - 0.774 m.y. ago |
Stratigraphy
| Geological group: | Ryukyu | Formation: | Chinen | ||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: Position within three 17482 localities not stated. Lower sand units were formely included in the Shimajiri beds, but they are disconformable with the underlying Shimajiri Formation. The lower sandy and silty part of the Ryukyu Group is divided into two elements, the Nakoshi Sand and the Chinen Sand. Presumably the two members are equivalent in age, but they are laterally not related. The Chinen sand is light gray to dark gray and more uniformely fine than the Nakoshi, and can have fine silt partings. Chinen sand belongs to calcareous nannoplankton zone CN13a and planktonic foram zone N22 (Ujiié, 1994), indicating a Calabrian age. | |||||
Lithology and environment
| Primary lithology: | fine,gray silty sandstone |
| Includes fossils? | Y |
| Lithology description: Light gray to dark gray, uniformely fine, can have fine silt partings. | |
| Environment: | marine indet. |
| Glacial or sequence phase: | transgressive |
| Geology comments: Probably reworked Shimajiri material during a transgression. Its deposition was followed immediately by a period during which reefs flourished and large ares were strewn with reef detritus. | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | field collection |
| Reason for describing collection: | taxonomic analysis |
| Museum repositories: | USNM |
| Collectors: | F. Stearns MacNeil |
Metadata
| Database number: | 42236 | ||
| Authorizer: | A. Hendy, M. Clapham | Enterer: | A. Hendy, M. Clapham |
| Modifier: | M. Clapham | Research group: | marine invertebrate |
| Created: | 2004-07-26 21:33:27 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2004-07-26 21:33:27 |
| Creative Commons license: | CC0 |
Reference information
Primary reference:
| 39467. | G. A. Cooper. 1957. Tertiary and Pleistocene Brachiopods of Okinawa, Ryukyu Islands. United States Geological Survey Professional Paper 314(A):1-20 [A. Hendy/A. Hendy] |