Where: Japan (42.9° N, 143.8° E: paleocoordinates 43.4° N, 142.2° E)
• coordinate estimated from map
• small collection-level geographic resolution
When: Ishiizawa Formation, Middle Miocene (16.0 - 11.6 Ma)
• STRATIGRAPHIC RELATIONS: From Ishiizawa Fm, which unconformably overlies the Tokomuro Fm (Middle Miocene). AGE: Middle Miocene on the basis of molluscan biostratigraphy. Approximately correlated with the lower part of the Togeshita Formation. STRATIGRAPHIC POSITION: From unknown position in regional section.
• formation-level stratigraphic resolution
Environment/lithology: coastal; poorly lithified siliciclastic sediments
Size class: macrofossils
Collection methods: COLLECTOR: Presumably K. Amano (c. 1980's). REPOSITORY: Joetsu University of Education, Japan (JUE)
Primary reference: K. Amano. 1986. Age and characteristics of the so-called "Atsunai-Togeshita fauna" in Hokkaido. Paleontological Society of Japan Special Papers 29:187-198 [A. Hendy/A. Hendy]more details
Purpose of describing collection: paleoecologic analysis
PaleoDB collection 81700: authorized by Austin Hendy, entered by Austin Hendy on 11.07.2008
Creative Commons license: CC BY (attribution)
Taxonomic list
Bivalvia | |
"Glycymeris (Glycymeris) idensis" = Glycymeris idensis
"Glycymeris (Glycymeris) idensis" = Glycymeris idensis Kanno 1956 clam | |
Spisula (Pseudocardium) haboroensis Yokoyama 1927 clam | |
Dosinia (Phacosoma) cf. owadaensis venus clam | |
Gastropoda | |
"Crepidula cf. grandis" = Grandicrepidula grandis
"Crepidula cf. grandis" = Grandicrepidula grandis Middendorf 1849 slipper shell | |
Naticidae indet. Guilding 1834 moon snail |