Middle Haborogawa Fm - Sample DF0067, Detofutamata River: Santonian, Japan

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Cephalopoda - Ammonitida - Baculitidae
Baculites bailyi Woods 1906
Cephalopoda - Ammonitida - Tetragonitidae
Tetragonites glabrus (Jimbo 1910)
Cephalopoda - Phylloceratida - Phylloceratidae
Bivalvia - Myalinida - Inoceramidae
Inoceramus (Inoceramus) amakusensis Nagao and Matsumoto 1940
Sphenoceramus naumanni (Yokoyama 1890)
see common names

Geography
Country:Japan
Coordinates: 44.1° North, 141.8° East (view map)
Paleocoordinates:52.2° North, 135.9° East (Wright 2013)
Basis of coordinate:estimated from map
Geographic resolution:outcrop
Time
Period: Cretaceous Epoch: Late Cretaceous
Stage: Santonian 10 m.y. bin: Cretaceous 6
Key time interval: Santonian Inoceramid zone:  Inoceramus amakusensis
Age range of interval: 85.7 - 83.6 m.y. ago
Stratigraphy
Geological group:Yezo Formation:Middle Haborogawa
Local section:Detofutamata River Local bed:185 m
Local order:bottom to top
Regional section:Chikubetsu
Stratigraphic resolution:group of beds
Stratigraphy comments: STRATIGRAPHIC RELATIONS: Unit Uf-g, Middle Haborogawa Fm overlain by Upper Haborogawa Fm of the Yezo Gp and the Campanian-Maastrichtian Pankezawa Fm. THICKNESS: 450 m. AGE: Santonian, Inoceramus amakusensis zone. STRATIGRAPHIC POSITION: At middle of section, at top of 250 m thick Middle Haborogawa Fm. Correlates closely to PBDB 62332 (DF0065) and 62334 (DF0069), ~20 m above PBDB 62331 (DF0079).
Lithology and environment
Primary lithology:bioturbation lithified sandy mudstone
Includes fossils?Y
Lithology description: SPECIFIC LITHOLOGY: Bioturbated sandy mudstone. LITHIFICATION: Unknown lithification, assumed to be lithified.
Environment:offshore
Glacial or sequence phase:regressive
Geology comments: ENVIRONMENT: No environmental data reported. Assigned to Siliciclastic - offshore on the basis of facies description. TECTONIC SETTING: No tectonic data reported. SEQUENCE STRATIGRAPHY: No sequence stratigraphic data reported, assumed to be regressive as in coarsening up portion of sedimentary sequence.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection methods:field collection
Reason for describing collection:biostratigraphic analysis
Collection method comments: COLLECTOR: Assumed to be collected by authors (Moriya and Hirano) and supplemented by collections of an earlier author Toshimitsu (see Toshimitsu 1988). REPOSITORY: Unknown repository, posibly Waseda University, Japan.
Taxonomic list comments:COMPLETENESS: Fairly comprehensive for all macrofauna. NOMENCLATURE: Not an authoritative publication, but with modern nomenclature and species-level assignments.
Metadata
Database number:62333
Authorizer:A. Hendy Enterer:A. Hendy
Modifier:G. Palazzo Research group:marine invertebrate
Created:2006-07-18 20:53:22 Last modified:2026-04-20 19:44:13
Access level:the public Released:2006-07-18 20:53:21
Creative Commons license:CC0
Reference information

Primary reference:
17980.1% 420K. Moriya and H. Hirano. 2001. Cretaceous stratigraphy in the Chikubetsu area, Hokaido. Journal of the Geological Society of Japan 107(3):199-214 [A. Miller/A. Hendy/A. Hendy]