USGS 17543, Highway 6 quarry (WF 234): Middle Pleistocene, Japan
collected by Warren Fuller

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Gastropoda - Neogastropoda - Columbellidae
MacNeil 1960
Gastropoda - Neogastropoda - Conidae
MacNeil 1960
Gastropoda - Cypraeidae
MacNeil 1960
Gastropoda - Trochidae
MacNeil 1960
Trochus niloticus Linnaeus 1767
MacNeil 1960
Gastropoda - Turbinidae
Turbo petholatus Linnaeus 1758
MacNeil 1960
MacNeil 1960
Rhynchonellata - Terebratulida - Cancellothyrididae
Terebratulina sp. d'Orbigny 1847
see common names

Geography
Country:Japan State/province:Okinawa
Coordinates: 26.4° North, 127.7° East (view map)
Paleocoordinates:
Basis of coordinate:estimated from map
Geographic resolution:outcrop
Time
Period: Quaternary Epoch: Pleistocene
Stage: Chibanian 10 m.y. bin: Cenozoic 6
Key time interval: Middle Pleistocene
Age range of interval: 0.774 - 0.129 m.y. ago
Stratigraphy
Geological group:Ryukyu Formation:Sobe
Stratigraphic resolution:group of beds
Stratigraphy comments: The Yontan Limestone is the upper part of the Ryukyu Limestone, now called the Sobe Formation. Early middle Pleistocene in age (Odawara et al., 2005).
Lithology and environment
Primary lithology:coarse poorly lithified conglomeratic "limestone"
Includes fossils?Y
Lithology description: Limestone, though coarser than that of the Naha. Locally it consists of unsorted detrital fragments up to a foot in dimension
Environment:reef, buildup or bioherm
Glacial or sequence phase:transgressive
Geology comments: Coral reef environment, according to Takayasu (1978)
Taphonomy
Modes of preservation:body,original aragonite
Size of fossils:macrofossils
Collection methods and comments
Collection methods:selective quarrying,field collection
Reason for describing collection:taxonomic analysis
Museum repositories:USNM
Collectors:Warren Fuller
Taxonomic list comments:Exhaustive for gastropoda. No bivalves.
Metadata
Database number:42356
Authorizer:A. Hendy, M. Clapham Enterer:A. Hendy, M. Clapham
Modifier:M. Clapham Research group:marine invertebrate
Created:2004-07-28 09:31:37 Last modified:2025-02-22 15:12:02
Access level:the public Released:2004-07-28 09:31:37
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]

Secondary references:

7337 F. S. MacNeil. 1960. Tertiary and Quaternary Gastropoda of Okinawa: A comparison of the late Miocene, Pliocene, and Pleistocene Gastropoda of Okinawa with related faunas of East Asia together with a resume of the geological setting of the fossiliferous deposits. United States Geological Survey Professional Paper 339:1-148 [A. Miller/C. Ferguson/P. Wagner]