View source for Earth:Chilgog Formation

{{short description|Geologic formation in South Korea}}
{{Infobox rockunit
| name           = Chilgog Formation
| image          =
| caption        =
| type           = [[Earth:Geological formation|Geological formation]]
| age            = Albian {{fossilrange|108.7|106.0}}
| period         = Albian
| prilithology   = [[Earth:Sandstone|Sandstone]], mudstone, [[Earth:Conglomerate (geology)|conglomerate]]
| otherlithology = [[Earth:Tuff|Tuff]]
| namedfor       =
| namedby        =
| region         = Gyeongsangbuk-do
| country        = {{flag|South Korea}}
| coordinates    = {{coord|36.0|N|128.5|E|display=inline,title}}
| paleocoordinates = {{coord|40.9|N|128.3|E|display=inline}}
| unitof         = Hayang Group
| subunits       =
| underlies      = Silla Conglomerate
| overlies       = [[Earth:Jinju Formation|Jinju Formation]]
| thickness      = Up to {{convert|650|m|ft|abbr=on}}<br>{{convert|295|m|ft|abbr=on}} in the western Daegu area
| extent         = Gyeongsang Basin
| area           = 
| map            = {{Location map+ | South Korea
| relief = 1
| width   = 250
| float   = center
| places  =
  {{Location map~ | South Korea
  | lat_deg = 36.0
  | lon_deg = 128.5
  | mark = Green pog.svg
  | marksize = 10
  }}
}}
| map_caption    = 
}}

The '''Chilgog Formation''' ({{Korean|hangul=칠곡층|rr=Chilgog-cheung|hanja=漆谷層}}), also known as the '''Chilgok Formation''', is an [[Earth:Early Cretaceous|Early Cretaceous]] geologic formation in {{wipe|South Korea}}.<ref name=PBDB>[https://paleobiodb.org/classic/displayStrata?geological_group=Hayang&formation=Chilgog&group_formation_member=Chilgog Chilgog Formation] in the [[Biology:Paleobiology Database|Paleobiology Database]]</ref> Formerly dated to the [[Earth:Berriasian|Berriasian]] to [[Earth:Hauterivian|Hauterivian]], later dating has established an [[Earth:Albian|Albian]] age.<ref name=Lee2018>Lee et al., 2018</ref> [[Biology:Dinosaur|Dinosaur]] remains, possibly of sauropods,<ref name=Kim1981>Kim, 1981</ref> are among the fossils that have been recovered from the formation, although none have yet been referred to a specific [[Biology:Genus|genus]].<ref name="dinosaurdistribution">Weishampel et al., 2004, pp.517-607</ref>

== Description ==
The formation predominantly consists of [[Earth:Sandstone|sandstone]], mudstone and [[Earth:Conglomerate (geology)|conglomerate]], with subordinate [[Earth:Tuff|tuff]] and other volcanics.<ref name=Choo2002>Choo et al., 2002</ref> It overlies the Jinju Formation and underlies the Silla Conglomerate, which underlies the [[Earth:Haman Formation|Haman Formation]], respectively.

== See also ==
* :ko:경상 분지 (Gyeongsang Basin)
* List of dinosaur-bearing rock formations
** List of stratigraphic units with indeterminate dinosaur fossils

== References ==
{{Reflist|2}}

=== Bibliography ===
<!--most recent first-->
* {{cite LSA |last=Lee |first=Tae-Ho |last2=Park |first2=Kye-Hun |last3=Yi |first3=Keewook |year=2018 |title=Nature and evolution of the Cretaceous basins in the eastern margin of Eurasia: A case study of the Gyeongsang Basin, SE Korea |url=https://linkinghub.elsevier.com/retrieve/pii/S1367912018302669 |journal=[[Earth:Journal of Asian Earth Sciences|Journal of Asian Earth Sciences]] |volume=166 |pages=19–31}} {{doi|10.1016/j.jseaes.2018.07.004}}
* {{cite LSA |last=Weishampel |first=David B. |last2=Dodson |first2=Peter |last3=Osmólska (eds.) |first3=Halszka |year=2004 |title=The Dinosauria, 2nd edition |url=https://books.google.com/books?id=vtZFDb_iw40C |publisher=Berkeley: University of California Press |pages=1–880 |accessdate=2019-02-21}} {{ISBN|0-520-24209-2}}
* {{cite LSA |last=Choo |first=Chang Oh |last2=Shin |first2=Young Sik |last3=Koh |first3=In Seok |year=2002 |title=Mineralogical evidence for red coloration of sandstones at the Chilgok Formation of the Cretaceous Hayang Group, Southeastern Korea |url=http://link.springer.com/10.1007/BF03028285 |journal=Geosciences Journal |volume=6 |issue=2 |pages=141–148}} {{doi|10.1007/BF03028285}} {{issn|1226-4806}}
* {{cite LSA |last=Kim |first=H.M |year=1981 |title=Cretaceous dinosaur bones excavated from two localities in Korea |journal=Journal of the Geological Society of Korea |volume=17 |pages=297}}

[[Category:Albian Stage]]
[[Category:Sandstone formations]]
[[Category:Mudstone formations]]
[[Category:Conglomerate formations]]
[[Category:Tuff formations]]

{{Sourceattribution|Chilgog Formation}}