Where: Gunma, Japan (36.3° N, 139.0° E: paleocoordinates 37.6° N, 137.4° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Itahana Formation (Tomioka Group), Tortonian to Tortonian (11.6 - 5.3 Ma)

• Siltstone of the outcrop represents the uppermost part of the upper member, and is covered by basal conglomerate of the Akima Formation.

• bed-level stratigraphic resolution

Environment/lithology: marine; siltstone

Size class: macrofossils

Preservation: replaced with carbon

Collection methods: surface (in situ),

• Of 14 species identified, 3 occupy more than 90% of the total specimens: "Ficus" about 60%, Alnus 21% and Salix misaotatewakii 10%. No species of evergreen broad-leaved trees are found.

Primary reference: K. Ozaki. 1991. Late Miocene and Pliocene Floras in Central Honshu, Japan. Bulletin of Kanagawa Prefectural Museam Natural Science Special Issue 1-244 [H. Sims/H. Lindon/H. Lindon]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 21270: authorized by Hallie Sims, entered by Heather Lindon on 24.06.2002

Creative Commons license: CC BY (attribution)