S-D locality 1, ?Wenlockian part, western Thailand (Silurian of Thailand)

Where: Thailand (13.8° N, 100.5° E: paleocoordinates 12.0° N, 135.6° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Wenlock (433.4 - 427.4 Ma)

• 10 m above the beds containing Monograptus cyphus

• group of beds-level stratigraphic resolution

Environment/lithology: basinal (); black 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.]

•SEP environmental call based on given info

• "...black shales with graptolites...The sequence also contains some limestone intercalations..."

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 13987: authorized by Michael Foote, entered by Michael Foote on 07.05.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Strophomenata
 Strophomenida - Leptestiidae
"? Leangella aff. segmentum" = Leangella (Leangella) segmentum
"? Leangella aff. segmentum" = Leangella (Leangella) segmentum Lindstrom 1861