S-D locality 12, Lower Devonian part, northwestern Thailand (Devonian to of Thailand)
Where: Thailand (18.2° N, 97.9° E: paleocoordinates 1.1° N, 140.2° E)
• coordinate based on nearby landmark
• basin-level geographic resolution
When: Lochkovian to Lochkovian (419.2 - 407.6 Ma)
Environment/lithology: basinal (); shale and limestone
• "The Silurian and Early Devonian rock sequence of Northern Thailand was formed in an area of marine sedimentation extending from Malaysia, Burma, and Thailand to Southern China, probably not surpassing 200 m in thickness. Whereas the Silurian mainly consists of fine clastics with local chert and limestone intercalations, the Lower Devonian is characterized by prevailing cherts, graptolite bearing black shales, limestones and minor amounts of sandy material. Due to complicated tectonics and thick vegetation so far continuous sections of these strata have not been spotted in Thailand." [NB localities 1, 2, and 13 are in western rather than northern Thailand, but it seems to be implied that these deposits are geologically related to those in the northwest.]
• "Limestones of Gedinnian to Siegenian and of Emsian age.."
Primary reference: H. Bastin, E. von Braun, A. Hess, K.-E. Koch, V. Stein, D. Stoppel, and R. Wolfart. 1977. Thailand. In A. Martinsson (ed.), The Silurian-Devonian boundary (IUGS, Series A, Number 5) 238-244 [M. Foote/M. Foote/M. Uhen]more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 13993: authorized by Michael Foote, entered by Michael Foote on 07.05.2002
Creative Commons license: CC BY (attribution)
Taxonomic list
• "[Early Devonian] deposits mainly composed of conodonts resp. tentaculitids in limestones and of phosphatic-shelled brachiopods, graptolites, and conodonts in black shales."
Show authors, comments, and common names
| Conodonta | |
"Spathognathodus inclinatus" = Wurmiella excavata
"Spathognathodus inclinatus" = Wurmiella excavata Branson and Mehl 1933 conodont | |
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Icriodus aff. woschmidti Ziegler 1960 conodont | |
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Acodus cf. triquestris conodont | |
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Belodella triangularis conodont | |