Gugyedong Formation

The Gugyedong Formation (Korean: 구계동층; Hanja: 龜溪洞層; RR: Gugyedong-cheung), also known as the Guyedong Beds, is an Aptian to Albian geologic formation in South Korea.^[1] Dinosaur remains diagnostic to the genus level are among the fossils that have been recovered from the formation.^[2]

Gugyedong Formation
Stratigraphic range: Aptian-Albian ~120–100 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Type	Geological formation
Unit of	Hayang Group
Lithology
Primary	Siltstone, conglomerate
Location
Coordinates	36.0°N 128.5°E / 36.0; 128.5
Approximate paleocoordinates	43.9°N 126.4°E / 43.9; 126.4
Region	Gyeongsangbuk-do
Country	South Korea
Extent	Gyeongsang Basin
Gugyedong Formation (South Korea)

Fossil content

The following fossils have been reported from the formation:^[1]

Reptiles

• Ultrasaurus tabriensis- Nomen Dubium^[3][4]
• Dromaeosauridae indet. (="Koreanosaurus koreanensis")^[3][5]
• Sauropoda indet.^[3]
• Testudines indet.^[5]

Flora

• Pseudofrenelopsis parceramosa^[5]

See also

• List of dinosaur-bearing rock formations
  • List of stratigraphic units with few dinosaur genera
• Hasandong Formation
• Jinju Formation