(ZT2 52)?, Radiolarian-bearing muddy cherts, Ziyun, Guizhou (Triassic of China)

Where: China (25.6° N, 106.6° E: paleocoordinates 15.1° N, 95.4° E)

• coordinate estimated from map

• hand sample-level geographic resolution

When: Xinyuan Formation, Middle Triassic (247.2 - 237.0 Ma)

Environment/lithology: basinal (siliceous); lithified, gray, muddy chert

• dark gray in outcrop

•The microtextural component consists of radiolarian particles and sponge spicules, enclosed in fine-grained material with particle-matrix or matrix-particle texture. Together, radiolarian particles with polycrystalline quartz texture and sponge spicules made up of single crystals of quartz comprise 30-40% of the rock. The radiolarians and sponge spicules are evenly scattered in the matrix. The matrix consists mainly of clay minerals, organic matter and volcanic glass, with a few fragments of microcrystalline calcedony.

Size class: microfossils

Primary reference: X. Wenchen and Z. Ning. 2000. Middle Triassic Radiolaria from turbudites in Ziyun, Guizhou South China. Micropaleontology 46(1):73-87 [J. Pálfy/A. Kocsis]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 131101: authorized by József Pálfy, entered by Adam Kocsis on 19.07.2012

Creative Commons license: CC BY (attribution)

Taxonomic list

Protozoa
 Entactinaria - Hindeosphaeridae
Pseudostylosphaera japonica Nakaseko and Nishimura 1979 radiolarian
Pseudostylosphaera compacta Nakaseko and Nishimura 1979 radiolarian
 Entactinaria - Eptingiidae
Eptingium manfredi Dumitrica 1978 radiolarian
 Nassellaria -
"Triassocampe cf. nova" = Japonocampe nova
"Triassocampe cf. nova" = Japonocampe nova Yao 1982 radiolarian
 Nassellaria - Poulpidae
Hozmadia sp. Dumitrica et al. 1980 radiolarian
Hozmadia reticulata Dumitrica et al. 1980 radiolarian
Hozmadia cf. reticulata Dumitrica et al. 1980 radiolarian
Poulpus cf. phasmatodes De Wever 1979 radiolarian
 Nassellaria - Deflandrecyrtiidae
Deflandrecyrtium sp. Kozur and Mostler 1979 radiolarian
 Nassellaria - Cuniculiformidae
Goestlingella cf. illyrica Kozur 1984 radiolarian
 Nassellaria - Parvicingulidae
Canoptum "sp. B" Pessagno et al. 1979 radiolarian
Canoptum pessagnoi n. sp. Wenchen and Ning 2000 radiolarian
 Nassellaria - Ruesticyrtiidae
Yeharaia "sp. A" Nakaseko and Nishimura 1979 radiolarian
sensu Mizutani
Yeharaia "sp. B" Nakaseko and Nishimura 1979 radiolarian
Triassocampe sp. Dumitrica et al. 1980 radiolarian
Triassocampe deweveri Nakaseko and Nishimura 1979 radiolarian
Triassocampe hunanensis n. sp. Wenchen and Ning 2000 radiolarian
Triassocampe scalaris Dumitrica et al. 1980 radiolarian
Triassocampe sulovensis Kozur and Mock 1981 radiolarian
Ruesticyrtium longum radiolarian
printed as 'Ruestyrtium'
 Nassellaria - Ultranaporidae
Silicarmiger sp. Dumitrica et al. 1980 radiolarian
 Nassellaria - Plagoniidae
Lithomelissa "sp. A" Ehrenberg 1847 radiolarian
 Nassellaria -
 Nassellaria - Archaeodictyomitridae
Dictyomitra "sp. A" Zittel 1876 radiolarian
printed as 'Dectyomitra'
Dictyomitra "sp. B" Zittel 1876 radiolarian
printed as 'Dectyomitra'
Dictyomitra "sp. C" Zittel 1876 radiolarian
printed as 'Dectyomitra'
 Spumellaria - Pantanelliidae
Gorgansium sp. Pessagno and Blome 1980 radiolarian
Gorgansium cf. thayeri Yeh 1989 radiolarian
Betraccium deweveri Pessagno and Blome 1980 radiolarian
 Spumellaria - Capnuchosphaeridae
Sarla sp. Pessagno et al. 1979 radiolarian
 Spumellaria - Stylosphaeridae
Stylosphaera sp. Ehrenberg 1847 radiolarian
 Spumellaria - Emiluviidae
Emiluvia sp. Foreman 1973 radiolarian