Jambi area: Asselian, Indonesia
collected by J. Zwierzycki, O. Posthumus 1925

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Rhynchonellata - Spiriferida - Elythidae
Toryniferinae indet. Carter 1994
(3 measurements)
Strophomenata - Strophomenida - Rugosochonetidae
Neochonetes (Neochonetes) carboniferus (Keyserling 1846)
(19 measurements)
Strophomenata - Productida
Marginifera (Arenaria) sp. Chen and Shi 2006
(2 measurements)
Strophomenata - Productida - Productidae
Reticulatia sp. Muir-Wood and Cooper 1960
(1 measurement)
Stereochia aff. irianensis Archbold 1981
(7 measurements)
Strophomenata - Productida - Linoproductidae
? Protoanidanthus sp. Waterhouse 1986
(2 measurements)
Cancrinella sp.
(2 measurements)
see common names

Geography
Country:Indonesia State/province:Jambi
Coordinates: 2.2° South, 102.2° East (view map)
Paleocoordinates:2.2° South, 102.2° East
Basis of coordinate:estimated from map
Geographic resolution:local area
Time
Period:Permian Epoch:Cisuralian
Stage:Asselian 10 m.y. bin:Permian 1
Key time interval:Asselian
Age range of interval:298.90000 - 293.52000 m.y. ago
Stratigraphy
Formation:Mengkarang
Stratigraphic resolution:member
Stratigraphy comments: The brachiopods do not come from the same locality as the fusulinids (which are assigned an Asselian or Sakmarian age), but the two stratigraphic levels are correlated. Because the original collections are mixed, the brachiopods may come from a larger stratigraphic interval. 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).
Lithology and environment
Primary lithology:shelly/skeletal lithified grainstone
Secondary lithology: lithified siltstone
Includes fossils?Y
Lithology description: 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.
Environment:shallow subtidal indet.
Geology comments: Limestones (which yielded most fossils) are interbedded with carbonaceous shales, tuffs, and thin coal beds, suggesting a very nearshore environment.
Taphonomy
Modes of preservation:body,mold/impression
Size of fossils:macrofossils
Collection methods and comments
Reason for describing collection:taxonomic analysis
Collectors:J. Zwierzycki, O. Posthumus Collection dates:1925
Collection method comments: Repository: Rijks Geologisch Museum (ZMA), donated to the Netherlands Center of Biodiversity Naturalis in 2010. It seems most likely that this "lost" collection was originally made in 1925 by Dr. J. Zwierzycki and Dr. O. Posthumus during the "Palaeobotanischen Djambi-Expedition 1925"
Metadata
Database number:152888
Authorizer:M. Clapham Enterer:M. Clapham
Modifier:M. Clapham Research group:marine invertebrate
Created:2013-12-02 12:25:44 Last modified:2020-05-02 09:09:27
Access level:the public Released:2013-12-02 12:25:44
Creative Commons license:CC BY
Reference information

Primary reference:
49273. 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]