Where: Thailand (16.7° N, 98.7° E: paleocoordinates 14.9° N, 105.0° E)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Brasilia bradfordensis ammonoid zone, Khun Huai Formation (Hua Fai Group), Middle Aalenian (175.6 - 171.6 Ma)

• Tak zinc mine sequence Level 1: 5m above the base. PJW: Was entered as Early/Lower Toarcian, but papers indicate Middle Aalenian Bradfordensis zone

• bed-level stratigraphic resolution

Environment/lithology: coastal; sandy mudstone and muddy sandstone

Size class: macrofossils

Primary reference: T. Kozai, F. Hirsch, K. Ishida and A. Meesook. 2006. Faunal affinity of Toarcian-Aalenian (Early Jurassic) bivalves from Mae Sot and Umphang (Tak Province), Northwestern Thailand. Geosciences Journal 10(3):205-215 [W. Kiessling/M. Nimke]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 87467: authorized by Wolfgang Kiessling, entered by Madeleine Nimke on 18.03.2009, edited by Daniel Wellmanns

Creative Commons license: CC BY (attribution)