The Chilgog Formation (Korean칠곡층; Hanja漆谷層; RRChilgok-cheung), also known as the Chilgok Formation, is an Early Cretaceous geologic formation in South Korea.[1] Formerly dated to the Berriasian to Hauterivian, later dating has established an Albian age.[2] Dinosaur remains, possibly of sauropods,[3] are among the fossils that have been recovered from the formation, although none have yet been referred to a specific genus.[4]

Chilgog Formation
Stratigraphic range: Albian 108.7–106.0 Ma
TypeGeological formation
Unit ofHayang Group
UnderliesSilla Conglomerate
OverliesJinju Formation
ThicknessUp to 650 m (2,130 ft)
295 m (968 ft) in the western Daegu area
Lithology
PrimarySandstone, mudstone, conglomerate
OtherTuff
Location
Coordinates36°00′N 128°30′E / 36.0°N 128.5°E / 36.0; 128.5
Approximate paleocoordinates40°54′N 128°18′E / 40.9°N 128.3°E / 40.9; 128.3
RegionGyeongsangbuk-do
Country South Korea
ExtentGyeongsang Basin
Chilgog Formation is located in South Korea
Chilgog Formation
Chilgog Formation (South Korea)

Description

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The formation predominantly consists of sandstone, mudstone and conglomerate, with subordinate tuff and other volcanics.[5] It overlies the Jinju Formation and underlies the Silla Conglomerate, which underlies the Haman Formation, respectively.

See also

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References

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  1. ^ Chilgog Formation in the Paleobiology Database
  2. ^ Lee et al., 2018
  3. ^ Kim, 1981
  4. ^ Weishampel et al., 2004, pp.517-607
  5. ^ Choo et al., 2002

Bibliography

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  • Lee, Tae-Ho; Park, Kye-Hun; Yi, Keewook (2018), "Nature and evolution of the Cretaceous basins in the eastern margin of Eurasia: A case study of the Gyeongsang Basin, SE Korea", Journal of Asian Earth Sciences, 166: 19–31, Bibcode:2018JAESc.166...19L, doi:10.1016/j.jseaes.2018.07.004
  • Weishampel, David B.; Dodson, Peter; Osmólska, Halszka (2004), The Dinosauria, 2nd edition, Berkeley: University of California Press, pp. 1–880, ISBN 0-520-24209-2, retrieved 2019-02-21
  • Choo, Chang Oh; Shin, Young Sik; Koh, In Seok (2002), "Mineralogical evidence for red coloration of sandstones at the Chilgok Formation of the Cretaceous Hayang Group, Southeastern Korea", Geosciences Journal, 6 (2): 141–148, Bibcode:2002GescJ...6..141C, doi:10.1007/BF03028285, ISSN 1226-4806
  • Kim, H.M (1981), "Cretaceous dinosaur bones excavated from two localities in Korea", Journal of the Geological Society of Korea, 17: 297