Where: Thailand (19.0° N, 98.0° E: paleocoordinates 22.8° S, 112.5° E)
• coordinate stated in text
• outcrop-level geographic resolution
When: Chadian (346.7 - 340.0 Ma)
• STRATIGRAPHIC RELATIONS: From unnamed lithostratigraphic unit, which is part of a Silurian-Carboniferous succession. AGE: middle Early Carboniferous, on the basis of radiolarian biostratigraphy; latest Tournasian-earliest Visean = Chadian; here placed in Chadian to avoid stratigraphic orphaning. STRATIGRAPHIC POSITION: From stop 10-2-4, near middle of section.
• group of beds-level stratigraphic resolution
Environment/lithology: marine; lithified, cherty/siliceous shale
Size class: macrofossils
Collection methods: bulk, chemical, hydroflouric, sieve,
• COLLECTORS: Not stated, but presumably by some of the authors. REPOSITORY: Palaeontology Laboratory, Faculty of Earth Sciences, China University of Geosciences, Wuhan, People’s Republic China. PREPARATION METHODS: Samples were divided into two parts: one part was retained as an accessory sample and the other part processed. The sample was fragmented and placed in 5 per cent HF for 24 hours. The solution was repeatedly decanted and refilled using water until neutral, and then sieved at 300 mm. The remaining residue was dried and scanned using a stereoscopic microscope. Fossil radiolarians were recovered from each of the 11 samples, but were well preserved in only four.
Primary reference: Q. Feng, D. Helmcke, C. Chonglakmani, R. Ingavat-Helmcke, and B. Liu. 2004. Early Carboniferous radiolarians from north-west Thailand: paleogeographical implications. Palaeontology 47(2):377-393 [A. Hendy/A. Hendy]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 90897: authorized by Austin Hendy, entered by Austin Hendy on 24.08.2009
Creative Commons license: CC BY (attribution)
Taxonomic list
Protozoa | |
Ceratoikiscum umbraculum Won 1983 radiolarian | |
Albaillella indensis Won 1983 radiolarian | |
Cyrtisphaeractenium cf. mendax, Archocyrtium coronaesimile, Archocyrtium sashidai, Archocyrtium diductum
Cyrtisphaeractenium cf. mendax Deflandre 1972 radiolarian
Archocyrtium coronaesimile Won 1983 radiolarian
Archocyrtium sashidai Feng et al. 2004 radiolarian
Archocyrtium diductum Deflandre 1973 radiolarian | |
Entactinia cf. tortispina, Entactinia vulgaris, "Astroentactinia multispinoasa" = Stigmosphaerostylus, Entactinosphaera palimbola
Entactinia cf. tortispina Ormiston and Lane 1976 radiolarian
Entactinia vulgaris Won 1983 radiolarian
"Astroentactinia multispinoasa" = Stigmosphaerostylus radiolarian
Entactinosphaera palimbola Foreman 1963 radiolarian | |
Polyentactinia polygonia Foreman 1963 radiolarian
Pylentonema antiqua Deflandre 1963 radiolarian | |
Triaenosphaera sicarius Deflandre 1973 radiolarian
Triaenosphaera cf. hebes Won 1983 radiolarian |