Sampling Localities IV/V, Hijikara Formation, Near Ohta, Japan (Pliocene of Japan)

Also known as Samples 30, 312,313, and 315

Where: Japan (36.3° N, 139.4° E: paleocoordinates 37.0° N, 138.6° E)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Hijikara Formation (Kakegawa Group), Pliocene (5.3 - 2.6 Ma)

• Overlies the Horinouchi Formation, interbedded with the T-3 tuff layer, thickly bedded.

• formation-level stratigraphic resolution

Environment/lithology: marine; poorly lithified, fine-grained, silty mudstone and tuff

• This formation was said to be deposited on a slope and in a geosynclinal trough in front of the shelf.
• thick bedded mudstone interbedded with T-3 tuff. Figure 1 of paper illustrates this formation as coarse-grained siltstone grading to the southeast into a fine-grained siltstone. This formation grades to the northwest into the fine grained sandstone of the Ukari fm.

Size classes: macrofossils, mesofossils, microfossils

Preservation: original aragonite, original calcite

Collection methods: bulk,

• There were 200-1500 individual forams present in each sample. The number of mollusc individuals per sample is not reported. Forams were extracted from blocks of sediment weighing 1-2kg each.

Primary reference: K. Chinzei and M. Aoshima. 1976. Marine Thermal Structure of the Plio-Pleistocene Warm Water in Central Japan. Journal of the Faculty of Science, University of Tokyo 19(3):179-203 [A. Miller/K. Bulinski/K. Bulinski]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 45528: authorized by Arnold Miller, entered by Kate Bulinski on 29.10.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

• Molluscs reported are all observed taxa in the given area. Forams in list are only those that were analyzed for oxygen isotope ratios and include only the most common foram species.
unclassified
  -
Lishkeia sp.
Lishkeia argent. hirasei
Globothalamea
 Rotaliida - Gavelinellidae
Gyroidina orbicularis d'Orbigny 1865
Foraminifera
 Buliminoidea - Buliminidae
Nodosariata
 Nodosariida - Stilostomellidae
Foraminifera
 Globigerinoidea - Globigerinidae
Globigerinoides ruber d'Orbigny 1839
Globigerina sp. d'Orbigny 1826
 Globigerinoidea - Globorotaliidae
Globorotalia sp. Cushman 1927
 Rotaliina - Bolivinitidae
 Buliminacea - Uvigerinidae
Bivalvia
 Nuculanida - Yoldiidae
"Yoldia similis" = Yoldia (Yoldia) similis
"Yoldia similis" = Yoldia (Yoldia) similis Kuroda and Habe 1952 clam
 Nuculanida - Malletiidae
 Nuculanida - Tindariidae