Tan Lac Formation, Song Da Basin, NW Vietnam (Triassic of Vietnam)

Where: Vietnam (21.5° N, 104.0° E: paleocoordinates 2.7° N, 94.0° E)

• coordinate based on nearby landmark

• basin-level geographic resolution

When: Tan Lac Formation, Olenekian (251.2 - 247.2 Ma)

• 800-900 m thick.

• formation-level stratigraphic resolution

Environment/lithology: marine; tuffaceous mixed carbonate-siliciclastic sediments and green marl

• Tuffaceous sandstone, tuffite, red siltstone, sandstone, greenish marl, clayish limestone. Marls contain fossils.

Size class: macrofossils

Primary reference: V. Khuc. 2000. The Triassic of Indochina Peninsula and its interregional correlation. Permian-Triassic Evolution of Tethys and Western Circum-Pacific 221-233 [D. Bottjer/M. Clapham/M. Clapham]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 44762: authorized by David Bottjer, entered by Matthew Clapham on 17.09.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Bivalvia
 Pectinida - Entoliidae
Entolium discites
Entolium discites Schlotheim 1820 scallop
ssp. microtis
 Trigoniida - Myophoriidae
Costatoria costata, Neoschizodus laevigatus
Costatoria costata Zenker 1833 clam
Neoschizodus laevigatus Ziethen 1830 clam
ssp. elongatus
Cephalopoda
 Ceratitida - Tirolitidae
Tirolites sp.
Tirolites sp. Mojsisovics 1879 ceratite