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Saku

FormationSaku
Age:93.5 - 89.3 Ma
Late/Upper Cretaceous
IntervalMiddle Turonian
Tectonic SettingForearc basin
Lithologymudstone, mudstone/sandstone, sandstone
Number of Collections27
Number of Occurrences181

Recorded Sample Locations

LocationRegionStratigraphic Name
Obirashibe RiverRumoi Subprefecture, Hokkaidō Prefecture, JapanSaku
Abeshinai AreaTeshio gold-PGM placers, Kamikawa Subprefecture, Hokkaidō Prefecture, JapanSaku
T1083p - Saku Kamikawa Subprefecture, Hokkaidō Prefecture, JapanSaku
R2110 - Obira Rumoi Subprefecture, Hokkaidō Prefecture, JapanSaku
Oyubari AreaYubari District, Sorachi Subprefecture, Hokkaidō Prefecture, JapanSaku
Loc. X 1117 - IkushunbetsuSorachi Subprefecture, Hokkaidō Prefecture, JapanSaku
Saku QuarryHarju County, EstoniaSaku

Associated Units

Stratigraphic NameAgeLithologyOccurrence Records
Keila - Lehtmetsa461 - 456 Ma
Ordovician
18
Keila - Pääsküla461 - 456 Ma
Ordovician
5
Keila - Saue461 - 456 Ma
Ordovician
16
Vasalemma453 - 443 Ma
Paleozoic
limestone, grainstone/wackestone, wackestone/quartzite, grainstone, grainstone/"limestone", "mixed carbonate-siliciclastic"195
Vasalemma - Saku458 - 452 Ma
Late/Upper Ordovician
limestone15
Hakobuchi70.6 - 66.0 Ma
Late/Upper Cretaceous
sandstone/siltstone, siltstone/sandstone41
Middle Yezo - Mikasa Sandstone93.9 - 89.8 Ma
Late/Upper Cretaceous
sandstone/mudstone69
Upper Yezo83.6 - 72.1 Ma
Late/Upper Cretaceous
mudstone52

Recorded Fossils

Accepted NameHierarchyAge
Chasmops sp.
genus
6Animalia : Arthropoda : Trilobita : Phacopida : Pterygometopidae : Chasmops460.9 - 455.8 Ma
Ordovician
Anazyga sp.
genus
6Animalia : Brachiopoda : Rhynchonellata : Atrypida : Anazygidae : Anazyga460.9 - 455.8 Ma
Ordovician
Porambonites sp.
genus
6Animalia : Brachiopoda : Rhynchonellata : Pentamerida : Porambonitidae : Porambonites460.9 - 455.8 Ma
Ordovician
Rhynchotrema sp.
genus
6Animalia : Brachiopoda : Rhynchonellata : Rhynchonellida : Rhynchotrematidae : Rhynchotrema460.9 - 455.8 Ma
Ordovician
Vellamo sp.
genus
6Animalia : Brachiopoda : Strophomenata : Billingsellida : Clitambonitidae : Vellamo460.9 - 455.8 Ma
Ordovician
Virucrinus kegelensis
species
7Animalia : Echinodermata : Crinoidea : Eustenocrinida : Eustenocrinidae : Virucrinus : Virucrinus kegelensis460.9 - 455.8 Ma
Ordovician
Hemicosmites sp.
genus
6Animalia : Echinodermata : Rhombifera : Hemicosmitidae : Hemicosmites460.9 - 455.8 Ma
Ordovician
Achradocystites sp.
genus
6Animalia : Echinodermata : Paracrinoidea : Comarocystitida : Achradocystites460.9 - 455.8 Ma
Ordovician
Glycymeris (Hanaia) hokkaidoensis
species
7Animalia : Mollusca : Bivalvia : Arcida : Glycymerididae : Glycymeris : Glycymeris (Hanaia) hokkaidoensis93.9 - 89.8 Ma
Late/Upper Cretaceous
Inoceramus sp.
genus
6Animalia : Mollusca : Bivalvia : Myalinida : Inoceramidae : Inoceramus93.5 - 89.3 Ma
Late/Upper Cretaceous
Inoceramus (Inoceramus) sp.
subgenus
6.3Animalia : Mollusca : Bivalvia : Myalinida : Inoceramidae : Inoceramus : Inoceramus (Inoceramus)93.9 - 89.8 Ma
Late/Upper Cretaceous
Acila (Truncacila) hokkaidoensis
species
7Animalia : Mollusca : Bivalvia : Nuculida : Nuculidae : Acila : Acila (Truncacila) hokkaidoensis93.9 - 89.8 Ma
Late/Upper Cretaceous
Romaniceras (Yubariceras) ornatissimum
species
7Animalia : Mollusca : Cephalopoda : Ammonitida : Acanthoceratidae : Romaniceras : Romaniceras (Yubariceras) ornatissimum93.9 - 89.8 Ma
Late/Upper Cretaceous
Sciponoceras sp.
genus
6Animalia : Mollusca : Cephalopoda : Ammonitida : Baculitidae : Sciponoceras93.9 - 89.8 Ma
Late/Upper Cretaceous
Damesites sp.
genus
6Animalia : Mollusca : Cephalopoda : Ammonoidea : Desmoceratidae : Damesites93.9 - 89.8 Ma
Late/Upper Cretaceous
Mesopuzosia sp.
genus
6Animalia : Mollusca : Cephalopoda : Ammonoidea : Desmoceratidae : Mesopuzosia93.5 - 89.3 Ma
Late/Upper Cretaceous
Scalarites sp.
genus
6Animalia : Mollusca : Cephalopoda : Ammonoidea : Diplomoceratidae : Scalarites93.9 - 89.8 Ma
Late/Upper Cretaceous
Anagaudryceras sp.
genus
6Animalia : Mollusca : Cephalopoda : Ammonoidea : Gaudryceratidae : Anagaudryceras93.9 - 89.8 Ma
Late/Upper Cretaceous
Gaudryceras (Gaudryceras) denseplicatum
species
7Animalia : Mollusca : Cephalopoda : Ammonitida : Gaudryceratidae : Gaudryceras : Gaudryceras (Gaudryceras) denseplicatum93.5 - 89.3 Ma
Late/Upper Cretaceous
Eubostrychoceras sp.
genus
6Animalia : Mollusca : Cephalopoda : Ammonoidea : Nostoceratidae : Eubostrychoceras93.9 - 89.8 Ma
Late/Upper Cretaceous
Hyphantoceras sp.
genus
6Animalia : Mollusca : Cephalopoda : Ammonoidea : Nostoceratidae : Hyphantoceras93.9 - 89.8 Ma
Late/Upper Cretaceous
Hyphantoceras (Madagascarites) sp.
subgenus
6.3Animalia : Mollusca : Cephalopoda : Ammonitida : Nostoceratidae : Hyphantoceras : Hyphantoceras (Madagascarites)93.9 - 89.8 Ma
Late/Upper Cretaceous
Otoscaphites (Hyposcaphites) perrini
species
7Animalia : Mollusca : Cephalopoda : Ammonitida : Scaphitidae : Yezoites : Otoscaphites (Hyposcaphites) perrini93.9 - 89.8 Ma
Late/Upper Cretaceous
Scaphites sp.
genus
6Animalia : Mollusca : Cephalopoda : Ammonitida : Scaphitidae : Scaphites93.9 - 89.8 Ma
Late/Upper Cretaceous
Scaphites obliquus
species
7Animalia : Mollusca : Cephalopoda : Ammonoidea : Scaphitidae : Scaphites : Scaphites obliquus93.5 - 89.3 Ma
Late/Upper Cretaceous
Scaphites subdelicatus
species
7Animalia : Mollusca : Cephalopoda : Ammonoidea : Scaphitidae : Scaphites : Scaphites subdelicatus93.5 - 89.3 Ma
Late/Upper Cretaceous
Yezoites sp.
genus
6Animalia : Mollusca : Cephalopoda : Ammonitida : Scaphitidae : Yezoites93.5 - 89.3 Ma
Late/Upper Cretaceous
Yezoites planus
species
7Animalia : Mollusca : Cephalopoda : Ammonoidea : Scaphitidae : Yezoites : Yezoites planus93.5 - 89.3 Ma
Late/Upper Cretaceous
Yezoites puerculus
species
7Animalia : Mollusca : Cephalopoda : Ammonoidea : Scaphitidae : Yezoites : Yezoites puerculus93.5 - 89.3 Ma
Late/Upper Cretaceous
Tetragonites epigonus
species
7Animalia : Mollusca : Cephalopoda : Ammonitida : Tetragonitidae : Tetragonites : Tetragonites epigonus93.9 - 89.8 Ma
Late/Upper Cretaceous
Tetragonites glabrus
species
7Animalia : Mollusca : Cephalopoda : Ammonitida : Tetragonitidae : Tetragonites : Tetragonites glabrus93.5 - 89.3 Ma
Late/Upper Cretaceous
Neophylloceras sp.
genus
6Animalia : Mollusca : Cephalopoda : Ammonoidea : Phylloceratidae : Neophylloceras93.5 - 89.3 Ma
Late/Upper Cretaceous
Patelloida sp.
genus
6Animalia : Mollusca : Gastropoda : Lottiidae : Patelloida93.5 - 89.3 Ma
Late/Upper Cretaceous
Solenopora sp.
genus
6Plantae : Rhodophyta : Rhodophyceae : Solenoporaceae : Solenopora460.9 - 455.8 Ma
Ordovician

References

Hayami I. (1975) A systematic survey of the Mesozoic Bivalvia from Japan, The University Museum, The University of Tokyo, Bulletin 10
Tanabe K. (1977) Mid-Cretaceous scaphitid ammonites from Hokkaido, Palaeontological Society of Japan Special Papers 21, 11-22
Tanabe K. (1979) Paleoecological analysis of ammonoid assemblages in the Turonian Scaphites facies of Hokkaido, Japan, Palaeontology 22 3, 609-630
Põlma L., Sarv L., et al (1988) Lithology and Fauna of the Caradoc series type sections in North Estonia, Academy of Sciences of the Estonian SSR Institute of Geology, 1-101
Kase T., Shigeta Y. (1996) New species of Patellogastropoda (Mollusca) from the Cretaceous of Hokkaido, Japan and Sakhalin, Russia, Journal of Paleontology 70 5, 762-771
Data courtesy of: PBDB: The Paleobiology Database, Creative Commons CC-BY licenced. , GBIF: the Global Biodiversity Information Facility, various licences, iDigBio, various licences, and EOL: The Encyclopedia of Life (Open Data Public Domain). Because fossils are made of minerals too!
 
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