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Itchoda Fm - Amakusa, Amakusa City, Kumamoto Prefecture, Japan
| Lat/Long (Decimal) | 32.4167,130.167 |
|---|---|
| Co-ordinates Derivation | based on nearby landmark |
| Mindat.org Region (for given coordinates) | Amakusa City, Kumamoto Prefecture, Japan |
Collections
| Collection | Reference | Stratigraphic Name | Comments | Lithology | Age |
|---|---|---|---|---|---|
| Itchoda Fm - Amakusa | Mizuno A. (1964) | Sakasegawa - Itchoda | STRATIGRAPHIC RELATIONS: From Itchoda Fm, which locally overlies the Middle Eocene Toishi Fm, and underlies the Sakasegawa Fm (Late Eocene). THICKNESS: From member within formation that attains a thickness of ~10 m. AGE: Late Eocene, based on molluscan biostratigraphy. STRATIGRAPHIC POSITION: From unknown part of formation in this local area. | sandstone | 37.2 - 33.9 Ma Paleogene |
| Itchoda-mura | Nagao T. (1928) | Sakasegawa - Itchoda | "shale" | 37.2 - 33.9 Ma Paleogene | |
| Kawamagari Fm - Asakusa | Mizuno A. (1964) | Kawamagari | STRATIGRAPHIC RELATIONS: From Kawamagari Fm, which locally overlies the Hoshuyama Fm (Middle Eocene), and is overlain by the Doshi Fm (Late Eocene). THICKNESS: From formation that attains a thickness of <50 m. AGE: Late Eocene, based on molluscan biostratigraphy. STRATIGRAPHIC POSITION: Composite list for the formation in this local area. | sandstone | 37.2 - 33.9 Ma Paleogene |
| Mirokudake | Nagao T. (1928) | Orthulax japonicus zone | not reported | 37.2 - 33.9 Ma Paleogene | |
| Sakasegawa Fm - Amakusa | Mizuno A. (1964) | Sakasegawa - Sakasegawa | STRATIGRAPHIC RELATIONS: From Sakasegawa Fm, which locally overlies the Late Eocene Itchoda Fm, both of the Sakasegawa Gp. THICKNESS: From formation that attains a thickness of ~1000 m. AGE: Late Eocene, based on molluscan biostratigraphy. STRATIGRAPHIC POSITION: Composite list for the formation in this local area. | siltstone | 37.2 - 33.9 Ma Paleogene |
| Locality 1 - Shiratake Fm, Amakusa | Mizuno A. (1964) | Shiratake | STRATIGRAPHIC RELATIONS: From Shiratake Fm, which conformably overlies the ?Early-Middle Eocene Akasaki Fm (and in places unconformably overlies Cretaceous sediments), and is conformably overlain by the Kyoragi Fm (Middle Eocene). THICKNESS: From bed within formation of group that attains a thickness of 100 m. AGE: Middle Eocene, based on molluscan biostratigraphy. STRATIGRAPHIC POSITION: From unknown position within formation. | sandstone | 48.6 - 37.2 Ma Eocene |
| Locality 2 - Shiratake Fm, Amakusa | Mizuno A. (1964) | Shiratake | STRATIGRAPHIC RELATIONS: From Shiratake Fm, which conformably overlies the ?Early-Middle Eocene Akasaki Fm (and in places unconformably overlies Cretaceous sediments), and is conformably overlain by the Kyoragi Fm (Middle Eocene). THICKNESS: From bed within formation of group that attains a thickness of 100 m. AGE: Middle Eocene, based on molluscan biostratigraphy. STRATIGRAPHIC POSITION: From unknown position within formation. | sandstone | 48.6 - 37.2 Ma Eocene |
| Locality 3 - Shiratake Fm, Amakusa | Mizuno A. (1964) | Shiratake | STRATIGRAPHIC RELATIONS: From Shiratake Fm, which conformably overlies the ?Early-Middle Eocene Akasaki Fm (and in places unconformably overlies Cretaceous sediments), and is conformably overlain by the Kyoragi Fm (Middle Eocene). THICKNESS: From bed within formation of group that attains a thickness of 100 m. AGE: Middle Eocene, based on molluscan biostratigraphy. STRATIGRAPHIC POSITION: From unknown position within formation. | sandstone | 48.6 - 37.2 Ma Eocene |
| Locality 4 - Shiratake Fm, Amakusa | Mizuno A. (1964) | Shiratake | STRATIGRAPHIC RELATIONS: From Shiratake Fm, which conformably overlies the ?Early-Middle Eocene Akasaki Fm (and in places unconformably overlies Cretaceous sediments), and is conformably overlain by the Kyoragi Fm (Middle Eocene). THICKNESS: From bed within formation of group that attains a thickness of 100 m. AGE: Middle Eocene, based on molluscan biostratigraphy. STRATIGRAPHIC POSITION: From unknown position within formation. | sandstone | 48.6 - 37.2 Ma Eocene |
| Locality 5 - Shiratake Fm, Amakusa | Mizuno A. (1964) | Shiratake | STRATIGRAPHIC RELATIONS: From Shiratake Fm, which conformably overlies the ?Early-Middle Eocene Akasaki Fm (and in places unconformably overlies Cretaceous sediments), and is conformably overlain by the Kyoragi Fm (Middle Eocene). THICKNESS: From bed within formation of group that attains a thickness of 100 m. AGE: Middle Eocene, based on molluscan biostratigraphy. STRATIGRAPHIC POSITION: From upper part of formation. | sandstone | 48.6 - 37.2 Ma Eocene |
| Locality 6 - Toishi Fm, Amakusa | Mizuno A. (1964) | Toishi | STRATIGRAPHIC RELATIONS: From Toishi Fm, which conformably overlies the Kyoragi Fm (Middle Eocene), and is conformably overlain by the Itchada Fm (Late Eocene). THICKNESS: From bed within formation of group that attains a thickness of ~500 m. AGE: Middle Eocene, based on molluscan biostratigraphy. STRATIGRAPHIC POSITION: From lowermost part of formation. | sandstone | 48.6 - 37.2 Ma Eocene |
Recorded Fossils
References
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!
