Nam Phong Formation

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The Nam Phong Formation, which correlates to the Indosinian III Unconformity, is a geological formation in Thailand. It underlies the Khorat Group. It consists of resistant, red-brown micaceous sandstones, conglomerates, siltstones and mudstones of mainly fluvial origin. The sandstones are medium to very fine-grained and are usually calcareous. The conglomerates contain pebbles of quartz, brown and grey chert, and reddish brown siltstone. Cross bedding and plane-bed stratification are common in the sandstones and conglomerates. The sandstones and conglomerates make up approximately 30% of the formation. This sedimentary rock formation is found in Khon Kaen Province, Thailand. It is of Norian to Rhaetian age (Upper Triassic) to (Lower Jurassic) age, and is notable for its fossils of early dinosaurs.[1]

Vertebrate paleofauna

Indeterminate prosauropod remains are present in Khon Kaen Province.[1]

Color key
Taxon Reclassified taxon Taxon falsely reported as present Dubious taxon or junior synonym Ichnotaxon Ootaxon Morphotaxon
Notes
Uncertain or tentative taxa are in small text; crossed out taxa are discredited.

Dinosaurs

Dinosaurs of the Nam Phong Formation
Genus Species Location Stratigraphic position Material Notes Images
Isanosaurus[1] I. attavipachi[1] Khon Kaen Province[1] "Associated fragmentary vertebrae, ribs, chevrons, scapula, sternal, femur."[2] A primitive sauropod
Sauropoda Indet.[3] Indeterminate

Correlations

The formation has been correlated with the Lower Elliot Formation (Karoo Basin) and Forest Sandstone of Africa, the Caturrita Formation of the Paraná Basin in Brazil, the Laguna Colorada and Los Colorados Formations (Ischigualasto-Villa Unión Basin) of Argentina, the Chinle Formation of North America, the Trössingen Formation of the Keuper Group of Germany, and the Lower Dharmaram Formation of India.[4]

See also

References

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  1. ↑ a b c d e Weishampel et al., 2004, pp.525–527
  2. ↑ "Table 13.1," in Weishampel et al., 2004, p.261
  3. ↑ Script error: No such module "Citation/CS1".
  4. ↑ Novas et al., 2011, p.343

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Bibliography

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