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The Gugyedong Formation (), also known as the Guyedong Beds, is an
Aptian The Aptian is an age in the geologic timescale or a stage in the stratigraphic column. It is a subdivision of the Early or Lower Cretaceous Epoch or Series and encompasses the time from 121.4 ± 1.0 Ma to 113.0 ± 1.0 Ma (million years ag ...
to
Albian The Albian is both an age of the geologic timescale and a stage in the stratigraphic column. It is the youngest or uppermost subdivision of the Early/Lower Cretaceous Epoch/ Series. Its approximate time range is 113.0 ± 1.0 Ma to 100.5 ± ...
geologic
formation Formation may refer to: Linguistics * Back-formation, the process of creating a new lexeme by removing or affixes * Word formation, the creation of a new word by adding affixes Mathematics and science * Cave formation or speleothem, a secondary ...
in
South Korea South Korea, officially the Republic of Korea (ROK), is a country in East Asia, constituting the southern part of the Korea, Korean Peninsula and sharing a Korean Demilitarized Zone, land border with North Korea. Its western border is formed ...
.Guyedong Formation
in the
Paleobiology Database The Paleobiology Database is an online resource for information on the distribution and classification of fossil animals, plants, and microorganisms. History The Paleobiology Database (PBDB) originated in the NCEAS-funded Phanerozoic Marine Paleo ...
Dinosaur Dinosaurs are a diverse group of reptiles of the clade Dinosauria. They first appeared during the Triassic period, between 243 and 233.23  million years ago (mya), although the exact origin and timing of the evolution of dinosaurs is t ...
remains diagnostic to the
genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial n ...
level are among the fossils that have been recovered from the formation.Weishampel et al., 2004, pp.517-607


Fossil content

The following fossils have been reported from the formation: ;Reptiles * '' Ultrasaurus tabriensis''Kim, 1983 * Dromaeosauridae indet. (=" Koreanosaurus koreanensis") * Sauropoda indet. * Testudines indet. ;Flora * '' Pseudofrenelopsis parceramosa''Kim et al., 2005


See also

*
List of dinosaur-bearing rock formations This list of dinosaur-bearing rock formations is a list of geologic formations in which dinosaur fossils have been documented. Containing body fossils * List of stratigraphic units with dinosaur body fossils ** List of stratigraphic units with f ...
**
List of stratigraphic units with few dinosaur genera This list of stratigraphic units with few non-avian dinosaur genera includes Mesozoic stratigraphic units of formation rank or higher that have produced dinosaur body fossils A fossil (from Classical Latin , ) is any preserved remains, i ...
*
Hasandong Formation The Hasandong Formation () is an Early Cretaceous (Aptian to Albian) geologic formation Formation may refer to: Linguistics * Back-formation, the process of creating a new lexeme by removing or affixes * Word formation, the creation of a new ...
*
Jinju Formation The Jinju Formation () is an Early Cretaceous geologic formation in South Korea.Journal of the Geological Society of Korea A journal, from the Old French ''journal'' (meaning "daily"), may refer to: *Bullet journal, a method of personal organization * Diary, a record of what happened over the course of a day or other period *Daybook, also known as a general journal, ...
, volume=19 , pages=115–126 Geologic formations of South Korea Cretaceous South Korea Lower Cretaceous Series of Asia Albian Stage Aptian Stage Conglomerate formations Siltstone formations Fluvial deposits Paleontology in South Korea