The Chilgog Formation (Korean: 칠곡층; Hanja: 漆谷層; RR: Chilgog-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 edit
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 edit
References 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; Kye-Hun Park, and Keewook Yi. 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. . doi:10.1016/j.jseaes.2018.07.004
- Weishampel, David B.; Peter Dodson, and Halszka Osmólska (eds.). 2004. The Dinosauria, 2nd edition, 1–880. Berkeley: University of California Press. Accessed 2019-02-21. ISBN 0-520-24209-2
- Choo, Chang Oh; Young Sik Shin, and In Seok Koh. 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. . 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. .