USGS 17580, north of Kitazato (DF 161): Calabrian - Middle Pleistocene, Japan
collected by Delos E. Flint
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Rhynchonellata
- Terebratulida
- Cancellothyrididae
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Terebratulina sp.
d'Orbigny 1847
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| see common names | |||||||
Geography
| Country: | Japan | State/province: | Okinawa |
| Coordinates: | 26.7° North, 127.9° East (view map) | ||
| Paleocoordinates: | |||
| Basis of coordinate: | estimated from map | ||
| Geographic resolution: | outcrop |
Time
| Period: | Quaternary | Epoch: | Pleistocene |
| Stage: | Calabrian - Chibanian | 10 m.y. bin: | Cenozoic 6 |
| Key time interval: | Calabrian - Middle Pleistocene | ||
| Age range of interval: | 1.8 - 0.129 m.y. ago |
Stratigraphy
| Geological group: | Ryukyu | Formation: | Naha | ||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: Coarse conglomerate bed 1 foot thick located about 15 feet below top of quarry. Naha Formation ranges from the middle Calabrian (c. 1.3 Ma) to the Middle Pleistocene (c. 0.4 Ma), according to Yamamoto et al. (2006). | |||||
Lithology and environment
| Primary lithology: | brown,white poorly lithified calcareous grainstone |
| Secondary lithology: | brown,white poorly lithified "limestone" |
| Includes fossils? | Y |
| Includes fossils? | Y |
| Lithology description: Poorly indurated medium to coarse grained lime sand, but other parts of it range from a powdery limestone to a dense nonporous limestone. It ranges in color from nearly white to brownish yellow. | |
| Environment: | lagoonal/restricted shallow subtidal |
| Glacial or sequence phase: | transgressive |
| Geology comments: Probably is a reef limestone, but only coral rich in a few places. It is presumed that the Naha Limestone is a detrital lagoon deposit or a reef detritus deposited on an insular shelf. The lower part is more widespread that the upper part, probably reflecting erosion during deposition of the Yontan Limestone. The highest beds are less conglomeratic and generally contain abundant algal nodules. | |
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: | Delos E. Flint |
Metadata
| Database number: | 190230 | ||
| Authorizer: | M. Clapham | Enterer: | M. Clapham | Research group: | marine invertebrate |
| Created: | 2017-12-03 16:39:51 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2017-12-03 16:39:51 |
| 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] |