Inuyama TR4A-OY7 (Triassic of Japan)

Where: Japan (35.4° N, 137.0° E: paleocoordinates 42.4° N, 117.1° E)

• coordinate estimated from map

When: Muelleritortis cochleata zone, Longobardian (242.0 - 235.0 Ma)

• sample below 1.24m (OY7) in the profile; studied sections are in the Kamiaso unit, which consists of thrust sheets of sedimentary sequences containing Triassic to Lower Jurassic bedded cherts and overying Middle Jurassic clastic rocks (sandstones, mudstone); studied thin sections (N and O) are located in the CH-2 thrust sheet

Environment/lithology: basinal (siliceous); red chert

• absence of carbonate rocks suggests that the primary depositional site was deeper than CCD, and beyond the reach of terrigenous clastic material

Size class: microfossils

Primary reference: Y. Tomimatsu, T. Nozaki, H. Sato, Y. Takaya, J.I. Kimura, Q. Chang, H. Naraoka, M. Rigo, and T. Onoue. 2021. Marine osmium isotope record during the Carnian “pluvial episode” (Late Triassic) in the pelagic Panthalassa Ocean. Global and Planetary Change 197 [B. Seuss/B. Seuss]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 211413: authorized by Barbara Seuss, entered by Barbara Seuss on 16.07.2020

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
unclassified
  -
Yaharaia elegans
Protozoa
 Nassellaria - Ultranaporidae
Silicarmiger latus
Silicarmiger latus radiolarian
 Nassellaria - Planispinocyrtiidae
Spinotriassocampe longobardica
 Nassellaria - Ruesticyrtiidae
Triassocampe "ssp.", Triassocampe postdeweveri
Triassocampe "ssp." Dumitrica et al. 1980 radiolarian
 Entactinaria - Hindeosphaeridae
Tritortis kretaensis, Muelleritortis cochleata