Itahana Flora Locality Ic: Tortonian - Messinian, Japan

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Angiospermae - Fabales - Fabaceae
1 specimen
Lespedeza sp. Michaux 1803
1 specimen
3 specimens
Angiospermae - Malpighiales - Salicaceae
1 specimen
Angiospermae - Fagales - Fagaceae
15 specimens
Angiospermae - Fagales - Betulaceae
8 specimens
Angiospermae - Rosales - Ulmaceae
2 specimens
Zelkova ungeri Kovats 1865
6 specimens
Angiospermae - Sapindales - Sapindaceae
4 specimens
Coniferales - Cupressaceae
1 specimen
see common names

Geography
Country:Japan State/province:Gunma
Coordinates: 36.3° North, 139.0° East (view map)
Paleocoordinates:35.9° North, 137.4° East (Wright 2013)
Basis of coordinate:estimated from map
Geographic resolution:outcrop
Time
Period: Neogene Epoch: Miocene
Stage: Tortonian - Messinian 10 m.y. bin: Cenozoic 6
*Period:Late/Upper Tertiary *Epoch:Late/Upper Miocene - Early/Lower Pliocene
Key time interval: Tortonian - Messinian
Age range of interval: 11.63 - 5.333 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Geological group:Tomioka Formation:Itahana
Stratigraphic resolution:formation
Lithology and environment
Lithology description: This cliff is consisting of conglomerate, sandstone, siltstone, tuffaceous sandy siltstone and tuff breccia, situated nearly 25 m abover the sediments of Locality G.
Environment:marine indet.
Taphonomy
Modes of preservation:original carbon
Size of fossils:macrofossils
Temporal resolution:snapshot
Spatial resolution:parautochthonous
Collection methods and comments
Collection methods:surface (in situ),field collection
Reason for describing collection:taxonomic analysis
Collection method comments: In the sandy siltstone Quercus occupies mearly half of the total, followed by Bembusites, Phragmites? and Acer. Sandstone abounds in Fagus stuxbergii which takes up 37% accompanied by Carpinus, Zelkova and Acer. No species of evergreen broad leaved trees are found.
Metadata
Database number:21264
Authorizer:H. Sims Enterer:H. Lindon
Modifier:J. Cassara Research group:paleobotany
Created:2002-06-24 06:49:16 Last modified:2025-02-22 15:12:02
Access level:the public Released:2002-06-24 06:49:16
Creative Commons license:CC0
Reference information

Primary reference:
6513. 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]