Itahana Flora Locality K: Tortonian - Messinian, Japan

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Coniferales - Cupressaceae
3 specimens
Angiospermae - Alismatales - Potamogetonaceae
1 specimen
Angiospermae - Poales - Poaceae
Gramineae indet. de Jussieu
12 specimens
Angiospermae - Aquifoliales - Aquifoliaceae
1 specimen
Angiospermae - Cornales - Cornaceae
2 specimens
Angiospermae - Saxifragales - Hamamelidaceae
1 specimen
Angiospermae - Moraceae
148 specimens
Angiospermae - Malpighiales - Salicaceae
6 specimens
4 specimens
5 specimens
Angiospermae - Fabales - Fabaceae
1 specimen
Lespedeza sp. Michaux 1803
1 specimen
2 specimens
Angiospermae - Fagales - Fagaceae
1 specimen
Angiospermae - Fagales - Betulaceae
22 specimens
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:bed
Stratigraphy comments: Siltstone of the outcrop represents the uppermost part of the upper member, and is covered by basal conglomerate of the Akima Formation.
Lithology and environment
Primary lithology: siltstone
Environment:marine indet.
Taphonomy
Modes of preservation:replaced with 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: 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.
Metadata
Database number:21270
Authorizer:H. Sims Enterer:H. Lindon
Modifier:J. Cassara Research group:paleobotany
Created:2002-06-24 08:26:01 Last modified:2025-02-22 15:12:02
Access level:the public Released:2002-06-24 08:26:01
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]