S-D locality 12, Lower Devonian part, northwestern Thailand: Lochkovian - Pragian, Thailand
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Conodonta
- Prioniodontida
- Icriodontidae
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Icriodus aff. woschmidti
Ziegler 1960
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Conodonta
- Prioniodontida
- Acodontidae
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Acodus cf. triquestris
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Conodonta
- Ozarkodinida
- Spathognathodontodae
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Spathognathodus inclinatus
Branson and Mehl 1933
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| synonym of Hindeodella excavata | |||||||
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Conodonta
- Belodellida
- Belodellidae
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Belodella triangularis
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| see common names | |||||||
Geography
| Country: | Thailand |
| Coordinates: | 18.2° North, 97.9° East (view map) |
| Paleocoordinates: | 1.1° North, 140.2° East |
| Basis of coordinate: | based on nearby landmark |
| Geographic resolution: | basin |
Time
| Period: | Devonian | Epoch: | Early/Lower Devonian |
| 10 m.y. bin: | Devonian 1 | ||
| *International age/stage: | Lochkovian - Pragian | ||
| Key time interval: | Lochkovian - Pragian | ||
| Age range of interval: | 419.20000 - 407.60000 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
Lithology and environment
| Primary lithology: | "shale" |
| Secondary lithology: | "limestone" |
| Includes fossils? | Y |
| Lithology description: "Limestones of Gedinnian to Siegenian and of Emsian age.." | |
| Environment: | basinal (siliciclastic) |
| Geology comments: "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.] | |
Taphonomy
Collection methods and comments
| Collection excludes: | some macrofossils |
| Reason for describing collection: | biostratigraphic analysis |
| Taxonomic list comments:"[Early Devonian] deposits mainly composed of conodonts resp. tentaculitids in limestones and of phosphatic-shelled brachiopods, graptolites, and conodonts in black shales." | |
Metadata
| Database number: | 13993 | ||
| Authorizer: | M. Foote | Enterer: | M. Foote |
| Modifier: | M. Foote | Research group: | marine invertebrate |
| Created: | 2002-05-07 09:48:47 | Last modified: | 2006-09-15 15:13:14 |
| Access level: | the public | Released: | 2002-05-07 09:48:47 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 6179. | 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] |