Chirashinaigawa Creek, Kj5 (Cretaceous of Japan)

Where: Hokkaido, Japan (44.7° N, 142.1° E: paleocoordinates 53.5° N, 140.2° E)

• coordinate stated in text

• small collection-level geographic resolution

When: Kamiji Formation (Lower Yezo Group), Early/Lower Albian (112.0 - 109.0 Ma)

• The Kamiji Formation is the lowest unit of the Yezo Group. Sample from unit 5 of the Kamiji Formation

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified mudstone

• poorly sorted mudstone, alternating beds of sandstone and mudstone, sandstone beds represent fine-grained turbidite facies

Size class: macrofossils

Primary reference: Y. Iba. 2009. An Early Albian Arctic-type ammonite Arcthoplites from Hokkaido, northern Japan, and its paleobiogeographic and paleoclimatological implications. Journal of Asian Earth Sciences 34:46-50 [W. Kiessling/U. Merkel]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 92725: authorized by Wolfgang Kiessling, entered by Uta Merkel on 26.11.2009, edited by Thomas Schossleitner

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Cephalopoda
 Ammonitida - Tetragonitidae
Tetragonites sp.
Tetragonites sp. Kossmat 1895 ammonite
 Ammonitida - Cleoniceratidae
? Cleoniceras sp., Arcthoplites (Subarcthoplites) sp.
? Cleoniceras sp. Parona and Bonarelli 1897 ammonite
 Ammonitida - Desmoceratidae
? Brewericeras sp.
? Brewericeras sp. Casey 1954 ammonite
 Belemnitida - Belemnopseidae
Neohibolites sp.
Neohibolites sp. Stolley 1911 belemnite
Bivalvia
 Myalinida - Inoceramidae
Mytiloides ipuanus