Uhangri Formation

Uhangri Formation
Stratigraphic range: Campanian 81–79 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓ [1]
Type	Geological formation
Unit of	Haenam Group
Lithology
Primary	Sandstone
Other	Shale
Location
Coordinates	34.6°N 126.4°E / 34.6; 126.4
Approximate paleocoordinates	38.5°N 115.0°E / 38.5; 115.0
Region	Cholla-namdo, Jeollanam-do
Country	South Korea
Uhangri Formation (South Korea)

The Uhangri Formation (Korean: 우항리층; Hanja: 牛項里層; RR: Uhangni-cheung), located at the Uhangri Dinosaur Fossil Site, is a geological formation from which fossil pterosaur tracks have been recovered near Haenam-eup, Jeollanam-do, South Korea.^[2]

Uhangri Dinosaur Fossil Site

Uhangri Formation
Hangul	우항리공룡화석자연사유적지
Hanja	牛項里恐龍化石自然史遺蹟地
Revised Romanization	Uhangni gongnyong hwaseok jayeonsa yujeokji
McCune–Reischauer	Uhangni kongnyong hwasŏk chayŏnsa yujŏkchi

The Uhangri Dinosaur Fossil Site area was originally covered by ocean, uncovered when Lake Damsuho, and surrounding area, was created by the construction of the Geumho Tide project.

Lake Damsuho has cliffs that are 3 to 4 metres (9.8 to 13.1 ft) high, stretching across about 5 kilometres (3.1 mi), made up of sedimentary rock formed during the Cretaceous age. Embedded in the rock formations around the lake are fossilized footprints of dinosaurs, pterosaurs and water birds that lived in this area tens of millions of years ago.

No other place in the world has fossil footprints of all these different dinosaurs found in a single area. The footprints of a pterosaur discovered in this area is the largest in the world at a length of 20 to 35 centimetres (7.9 to 13.8 in).^[3]

Fossil contents

Pterosaur tracks

Pterosaur tracks from the Uhangri Formation are housed at the Dinosaur Tracks Museum, of the University of Colorado at Denver and Chonnam National University, Gwangju, South Korea.^[4]

Pterosaur tracks of the Uhangri Formation[4]
Taxa	Presence	Description	Images
Haenamichnus uhangriensis	Haenamichnus type locality
Pteraichnus	Haenamichnus type locality

Dinosaur tracks

Dinosaur tracks of the Uhangri Formation[5]
Taxa	Presence	Description	Images
Hwangsanipes choughi	Haenam	Ornithuromorph bird tracks
Uhangrichnus chuni	Haenam	Ornithuromorph bird tracks
Caririchnium	Haenam	Ornithopod tracks

Arthropod tracks

Arthropod tracks of the Uhangri Formation[6]
Taxa	Presence	Description	Images
Lithographus hieroglypichus		Possibly made by Pterygota

Paleoflora

Plants of the Uhangri Formation[5]
Taxa	Presence	Description	Images
Cupressinoxylon uhangriense
Taxodioxylon cf. nihongii

See also

• List of fossil sites

References

1. Kim, C.B.; Kim, J.M.; Huh, M. (2008). "Age and stratification of dinosaur eggs and clutches from Seonso Formation, South Korea" (PDF). Journal of the Korean Earth Science Society. 29 (5): 386–395. doi:10.5467/JKESS.2008.29.5.386.
2. Uhangri Formation at Fossilworks.org
3. "visitkorea". Retrieved 2013-03-19.
4. Lockley et al., 2008
5. Kim, Jeong Yul; Huh, Min (2018). Dinosaurs, Birds, and Pterosaurs of Korea: A Paradise of Mesozoic Vertebrates (PDF). Springer Nature. ISBN 978-981-10-6998-7.
6. Minter, Nicholas J.; Lockley, Martin G.; Huh, Min; Hwang, Koo-Geun; Kim, Jeong Yul (2012). "Lithographus, an Abundant Arthropod Trackway from the Cretaceous Haenam Tracksite of Korea". Ichnos. 19 (1–2): 115–120. Bibcode:2012Ichno..19..115M. doi:10.1080/10420940.2011.625756. S2CID 129177512.

Bibliography

• Lockley, M.; Harris, J.D.; and Mitchell, L. 2008. "A global overview of pterosaur ichnology: tracksite distribution in space and time." Zitteliana. B28. p. 187-198. ISSN 1612-4138
• K.-G. Hwang, M. Huh, M. G. Lockley, D. M. Unwin, and J. L. Wright. 2002. New pterosaur tracks (Pteraichnidae) from the Late Cretaceous Uhangri Formation, southwestern Korea. Geological Magazine 139:421-435
• Y.-N. Lee and M. Huh. 2002. Manus-only sauropod tracks in the Uhangri Formation (Upper Cretaceous), Korea and their paleobiological implications. Journal of Paleontology 76(3):558-564
• Y.-N. Lee, K.-M. Yu, and C. B. Wood. 2001. A review of vertebrate faunas from the Gyeongsang Supergroup (Cretaceous) in South Korea. Palaeogeography, Palaeoclimatology, Palaeoecology 165:357-373
• S.-Y. Yang, M.G. Lockley, R. Greben, B.R. Erickson, and S.-K. Lim. 1995. Flamingo and duck-like bird tracks from the Late Cretaceous and Early Tertiary: evidence and implications. Ichnos 4:21-34

External links

• Haenam Uhangri Dinosaur Museum