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Akiyoshi Limestone
Synonym: Akiyoshi Limestone Group
- Type locality: Akiyoshi, Mine city, Yamaguchi prefecture
- Seamount-reef complex in the Panthalassa ocean
- Exotic blocks in an accretionary complex
- Deposition (Limestone): early Carboniferous, Visean - middle Permian, Capitanian (Fusulinids, Foraminifera)
- Accretion: middle - late Permian
- Correlation: Omi Limestone
- Sedimentary facies: Shallow marine
- Sedimentary facies (Permian): Tidal flat, Terrestrial beach
- Sedimentary facies (late Carboniferous): Terrestrial
- Sedimentary facies (early Carboniferous): Reef
- Climate (Permian): Warm, Sea level rise
- Climate (late Carboniferous): Cold, Frequent sea level changes
- Climate (early Carboniferous): Warm, High sea level
- Depth of water: Shallow
- Lithofacies (Upper): Microbialite by calcareous cyanobacteria
- Lithofacies (Middle): Reef limestone (Corals, Chaetetes)
- Lithofacies (Lower): Oolitic limestone
- Lithofacies (Bottom): Basaltic rocks
- Thickness: 1,000 m or thicker
- Distribution (East-West): ca. 15 km
- Distribution (South-North): ca. 8 km
- Upper limit: Mine Group
- Akiyoshi Limestone (Onoda)
- [ Upper ]
- /--/--/--/--/-
- Zuiko Limestone
- /--/--/--/--/-
- [ Lower ]
- Akiyoshi Limestone (Biohorizon)
- [ Upper ]
- /--/--/--/--/-
- Lepidolina multiseptata
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- Colania douvillei
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- Verbeekina verbeeki
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- Neoschwagerina craticulifera
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- Afghanella? ozawai
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- Parafusulina kaeriizensis
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- Misellina claudiae
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- Pseudofusulina ex gr. kraffti
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- Chalaroschwagerina vulgaris
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- Sphaeroschwagerina - Pseudoschwagerina
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- Triticites - Rauserites - Carbonoschwagerina
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- Protiriticites - Montiparus - Quasifusulinoides
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- Beedeina akiyoshiensis
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- Fusulinella biconica
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- Profusulinella beppensis
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- Pseudostaffella antiqua
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- Millerella? yowarensis
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- Mediocris - Eostaffella
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- Endothyra - Zaphrentoides
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- Gnathodus delicatus - Gnathodus semiglaber
- /--/--/--/--/-
- [ Lower ]
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Shuho town - Mito town - Mine city, Yamaguchi pref.
- Fossils: Fusulinids, Foraminifera, Bryozoans, Brachiopods, Shellfishes, Calcareous algae, Chaetetes
- Fossils (Corals): Nagatophyllum, Amygdallophylloides, Axophyllids, Pseudopavona sp., Ibukiphyllum sp.
- Fossils (middle Permian): Sponges (Sphinctozoa, Inozoa, Chaetetes), Cyanobacteria
- Fossils (late Carboniferous - early Permian): Calcareous algae (Palaeoaplysina sp.)
- Fossils (late Carboniferous): Sponges (Chaetetes), Rugosa, Bryozoa, Cyanobacteria, Calcareous algae
- Fossils (early Carboniferous): Rugosa, Bryozoa, minor Cyanobacteria
- Fujikawa et al. (2019) Jour. Geol. Soc. Japan, vol.125, no.8, pp.609-631 DOI
- Imaoka et al. (2019) Jour. Geol. Soc. Japan, vol.125, no.7, pp.529-553 DOI
- Tazawa et al. (2009) Jour. Geol. Soc. Japan, vol.115, no.4, pp.168-176 DOI
- Sano et al. (2009) Jour. Geol. Soc. Japan, vol.115, Supplement, pp.71-88 DOI