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)
• These beds are situated about 10 m above those of Loc. I.
• bed-level stratigraphic resolution
Environment/lithology: marine; poorly lithified, sandy sandstone
Size class: macrofossils
Preservation: original carbon
Collection methods: surface (in situ),
• Carya is most predominant in number of specimens, followed by Ulmus protojaponica, Carpinus miocenica, Halesia sp., Carpolithes japonicus, and Pterocarya protostenopteris. No species of evergreen broad leaved trees are found. Siltstone in the upper cyclothem yields poor fossils in three horixons, comprising only "Ficus" and Gramineae.
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 21265: authorized by Hallie Sims, entered by Heather Lindon on 24.06.2002
Creative Commons license: CC BY (attribution)
Taxonomic list
Carpolithes | |
Angiospermae | |
Vitis naumannii grapevine | |
Alnus cf. japonica, Ostrya sp., Carpinus heigunensis, Carpinus miocenica, Carpinus cf. japonica, Carpinus sp.
Alnus cf. japonica alder
Ostrya sp. Scopoli 1760 hophornbeam
Carpinus heigunensis hornbeam
Carpinus miocenica hornbeam
Carpinus cf. japonica hornbeam
Carpinus sp. Linnaeus 1753 hornbeam | |
Caesalpinia hokiana peacock flower
Cladrastis aniensis yellowwood
Cladrastis inouei yellowwood
Lespedeza sp. Michaux 1803 bush clover | |
Spiraea protothunbergii meadowsweet | |
"Berchemia miofloribunda" = Berhamniphyllum miofloribundum
"Berchemia miofloribunda" = Berhamniphyllum miofloribundum Hu and Chaney 1940 buckthorn | |
Malus sp. Miller 1758 | |
Salix ksuzukii willow
Salix muraii willow
Salix parasachalinensis willow
Salix sp. Linnaeus 1753 willow | |
Acer nordenskioeldii maple
Acer sp. Linnaeus 1753 maple
Acer protomiyabei Endo 1950 maple
? Sapindus sp. Linnaeus 1753 soapnut | |
Dicotyledoneae | |
Styrax cf. japonica storax
Halesia sp. Linnaeus 1759 silverbell | |
Angiospermae | |
Cocculus sp. de Candolle 1817 | |
Fraxinus sp. Linnaeus 1753 ash | |
Ilex cf. serrata holly | |
Lonicera sp. Linnaeus 1753 honeysuckle | |
"Gramineae indet." = Poaceae Barnhart 1895 true grass
Bambusites sp. Ettingshausen 1886 grass
? Phragmites sp. Adanson 1763 common reed | |
Carex spp. Linnaeus 1753 sedge | |
Magnolia sp. Linnaeus 1753 magnolia | |
Metasequoia occidentalis Chaney 1951 dawn redwood | |
Pinopsida | |