The Chilgog Formation (Korean: 칠곡층; Hanja: 漆谷層; RR: Chilgok-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 | |
| Type | Geological formation |
| Unit of | Hayang Group |
| Underlies | Silla Conglomerate |
| Overlies | Jinju Formation |
| Thickness | Up to 650 m (2,130 ft) 295 m (968 ft) in the western Daegu area |
| Lithology | |
| Primary | Sandstone, mudstone, conglomerate |
| Other | Tuff |
| Location | |
| Coordinates | 36°00′N 128°30′E / 36.0°N 128.5°E |
| Approximate paleocoordinates | 40°54′N 128°18′E / 40.9°N 128.3°E |
| Region | Gyeongsangbuk-do |
| Country |  South Korea |
| Extent | Gyeongsang Basin |
  Chilgog Formation (South Korea) | |
Description
editThe 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
editReferences
edit- ^ Chilgog Formation in the Paleobiology Database
- ^ Lee et al., 2018
- ^ Kim, 1981
- ^ Weishampel et al., 2004, pp.517-607
- ^ Choo et al., 2002
Bibliography
edit- 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