North slope of the local road 919, Gyeongsan City, close to Daegu City: Albian, South Korea
collected by Ki-Hong Chang 1971

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Reptilia - Testudines
Kirgizemys cf. exaratus Nessov and Khozatskii 1981
1 specimen
KIGAM VP 200506: Carapace fragments including a neural, left costals 1, 3, 6, right costal 4, posterior part of right peripheral 2, right peripherals 3–6, left peripheral 4-5, 7, left peripheral 10
see common names

Geography
Country:South Korea State/province:Daegu
Coordinates: 35.9° North, 128.6° East (view map)
Paleocoordinates:45.2° North, 122.7° East
Basis of coordinate:based on nearby landmark
Geographic resolution:small collection
Time
Period:Cretaceous Epoch:Early/Lower Cretaceous
Stage:Albian 10 m.y. bin:Cretaceous 4
Key time interval:Albian
Age range of interval:113.00000 - 100.50000 m.y. ago
Stratigraphy
Geological group:Hayang Formation:Geoncheonri
Stratigraphy comments: From the Albian, Lower Cretaceous, of the Geoncheonri Formation in Gyeongsan City near Daegu Metropolitan City, South Korea.
The Geoncheonri Formation (ca. 800 m thick) is the uppermost formation of the Hayang Group, belonging to the Gyeongsang Supergroup. The Gyeongsang Supergroup is widely distributed in the south-eastern part of the Korean Peninsula, mainly within the Gyeongsang Basin, which is the largest sedimentary basin of the Korea. It is divided into the Shindong and Hayang Groups, mainly comprised of thick siliciclastic sequences of alluvial, fluvial and lacustrine sediments, and the Yuchon Group characterized by the dominance of volcanic rocks (Chang, 1975). The Hayang Group consists of Chilgok, Silla, Hakbong, Haman, Banyawol, Songnaedong, Chaeyaksan, and Geoncheonri formations in ascending order. The Geoncheonri Formation is conformably underlain by the Chaeyaksan Formation and overlain by the Jusasan Formation, the lowermost of the Yucheon Group... Since plant fossils were first reported in the Geoncheonri Formation in 1925, a series of paleontological study has been made with molluscs, spores and pollen, charophytes, and dinosaur footprints. Plant fossils from the Geoncheonri Formation were correlated with the Monobegawa Group and the Gyliak Series (Lower to ‘‘middle’’ Cretaceous) in Japan (Tateiwa, 1925, 1929). Yang (1978) noted that the co-occurrence of a pelecypod Trigonioides (s. s.) paucisulcatus in the Geonchonri Formation and in the Gyliakian Goshonoura Group (Cenomaian to Turonian) of Japan (Ota, 1959). However, primitive angiosperm pollen (Retimonocolpites peroreticulatus, R. sp. A, R. sp. B., and Tricolpites sp.) and other palynological features suggest that the age of the Geoncheonri Formation is Aptian to Albian (Choi, 1985, 1989). The charophytes from the Geoncheonri Formation also indicate Aptian to Albian age (Choi, 1987).
Lithology and environment
Primary lithology:gray mudstone
Secondary lithology:planar lamination siltstone
Includes fossils?Y
Lithology description: It was in the dark gray mudstone of the lower part of the Geoncheonri Formation. ...The Geoncheonri Formation consists predominantly of dark gray interlaminated to thinly interbedded fine sandstone to siltstone and thinly laminated mudstone associated with calcareous silty mudstone, indicating shallow lacustrine deposits (Paik et al., 2000).
Environment:lacustrine - small
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection methods:surface (in situ),mechanical,field collection
Reason for describing collection:taxonomic analysis
Collectors:Ki-Hong Chang Collection dates:1971
Collection method comments: KIGAM VP (Korea Institute of Geoscience and Mineral Resources, Vertebrate Paleontology Catalogue Number)
Metadata
Database number:127741
Authorizer:R. Benson Enterer:R. Benson
Modifier:M. Carrano Research group:vertebrate
Created:2012-05-23 01:06:10 Last modified:2013-12-11 14:00:35
Access level:the public Released:2012-05-23 01:06:10
Creative Commons license:CC BY
Reference information

Primary reference:
41729. Y. -N. Lee, J. H. Hutchison, and K.-H. Chang. 2009. The first Mesozoic turtle from South Korea. Cretaceous Research 30:1287-1292 [R. Benson/R. Benson/P. Holroyd]