Itahana Flora Locality B (Miocene to of Japan)

Where: Gunma, Japan (36.3° N, 138.5° E)

• Paleocoordinates: 35.9° N, 136.9° E (Wright 2013)

• coordinate estimated from map

• outcrop-level geographic resolution

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

• formation-level stratigraphic resolution

Environment/lithology: marine; siltstone and sandstone

• Ozaki 1991; Plant fossils occur tuffaceous siltstone, which is hollowed by erosion near the river bed. Tuffaceous siltstone grades upward into thick sand and gravel beds of 2 m thickness, which comprise Oyster bed with abundant Glycymeris cisshuensis Makiyama and Chlamys kaneharai. The plant-bearing rocks are in the sandstone rich facies of the middle part of the lower member.

Size class: macrofossils

Collection methods: surface (in situ),

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 21225: authorized by Hallie Sims, entered by Heather Lindon on 21.06.2002

Creative Commons license: CC0 (CC0)

Taxonomic list

Show authors, comments, and common names
Angiospermae
 Poales - Poaceae
Bambusites sp.
Bambusites sp. Ettingshausen 1886 grass
 Aquifoliales - Aquifoliaceae
Ilex cf. serrata
 Laurales - Lauraceae
Actinodaphne cf. lancifolia, Lindera cf. erythrocarpa, Lindera cf. glauca, Lindera cf. miyataensis, Cinnamomum cf. japonicum
 Fabales - Fabaceae
Wisteria fallax, Cladrastis aniensis
 Fagales - Juglandaceae
Pterocarya asymmetrosa
 Rosids - Moraceae
"Ficus" tiliaefolia
 Magnoliales - Magnoliaceae
Magnolia sp.
Magnolia sp. Linnaeus 1753 magnolia
Dicotyledoneae
 Ericales - Styracaceae
Styrax cf. japonica