TGD2, Teluk Gedang (Permian of Indonesia)

Where: Jambi, Indonesia (2.2° S, 102.2° E: paleocoordinates 2.2° S, 102.2° E)

• coordinate estimated from map

• small collection-level geographic resolution

When: Mengkarang Formation, Asselian (298.9 - 295.5 Ma)

• "All above mentioned lines of evidence suggest that the Teluk Gedang fusuline fauna is referable to the Sakmarian rather than to the Asselian in the traditional chronostratigraphic scale of the Tethyan Permian, although the latter age is also potentially likely based on the overall generic composition." Radiometric dating of tuff beds from the base and the top of the formation indicates an average duration of 630,000 years, from 296.77 ± 0.04 to 296.14 ± 0.09 Ma (Van Waveren et al., 2017).

• bed-level stratigraphic resolution

Environment/lithology: shallow subtidal; lithified, shelly/skeletal grainstone

• Limestones (which yielded most fossils) are interbedded with carbonaceous shales, tuffs, and thin coal beds, suggesting a very nearshore environment.
• Microfacies of bioclastic grainstone and oncoidal-fusuline rudstone contains Girvanella oncoids, the presence of which suggests deposition in a warm-water, shallow marine environment. The bioclasts include the fusulines (described below), brachiopod shell fragments, crinoid stems, calcareous algae and rare small foraminifers.

Size classes: mesofossils, microfossils

Collected in 2004

Collection methods: peel or thin section

Primary reference: G. Crippa, L. Angiolini, I. Van Waveren, M. J. Crow, F. Hasibuan, M. H. Stephenson, and K. Ueno. 2014. Brachiopods, fusulines and palynomorphs of the Mengkarang Formation (Early Permian, Sumatra) and their palaeobiogeographical significance. Journal of Asian Earth Sciences 79:206-223 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 152890: authorized by Matthew Clapham, entered by Matthew Clapham on 02.12.2013

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Foraminifera
 Fusulinoidea - Schwagerinidae
Pseudoschwagerina cf. afghanensis, Pseudoschwagerina meranginensis, Pseudofusulina rutschi
Pseudofusulina rutschi Thompson 1936
 Fusulinoidea - Schubertellidae
Schubertella sp.
Schubertella sp. Staff and Wedekind 1910