Dapyeongri paleosol, lower bone layer (Cretaceous to of South Korea)

Where: Gyeongsangnam-do, South Korea (34.9° N, 128.1° E: paleocoordinates 42.9° N, 126.4° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Hasandong Formation (Shindong Group), Late/Upper Aptian to Late/Upper Aptian (122.5 - 109.0 Ma)

• Previously, a Hauterivian-Barremian age for the Hasandong Formation was proposed, based on palynomorph assemblages (Choi, 1985; Choi, 1989; Yi et al. 1994). However, molluscan faunas suggest and Aptian-Albian age (Yang 1982) and Lee et al. 2018 SHRIMP and U-pb analyses provided a maximum depositional age of approximately 118+/-2.6Ma. The youngest detrital zircon ages were approximately 109Ma (Lee et al. 2010)

• bed-level stratigraphic resolution

Environment/lithology: dry floodplain; bioturbated, paleosol/pedogenic, pebbly, brown, red, sandy mudstone and burrowed, paleosol/pedogenic, intraclastic, ooidal, gray, green, sandy mudstone

• Floddplain paleosol with arid, seasonal climate with alternating wet and dry.
• "a type of cumulate-truncated paleosol profile consisting of a reddish-brown calcic paleosol (lower part) and a greenish-gray vertic-calcic paleosol (upper part). Planar to cross-laminated fine sandstone (crevasse splay deposits) overlies the bone deposit with an erosive contact, and grades into mudstone in which the calcrete nodules are scattered...The lower calcic paleosol is composed of sandy mudstone and is bioturbated in upper part. Tubular and nodular calcretes are scattered (especially in the upper part), and ornithoid egg-shell fragments are included. Some well-rounded pebbles consisting of crystalline rock, variegated sandstone, and mudstone with pedogenic calcite rims are, in places, present just below the upper vertic-calcic paleosol in which dinosaur bone fragments occur."

Size class: mesofossils

Primary reference: I. S. Paik. 2000. Bone chip-filled burrows associated with bored dinosaur bone in floodplain paleosols of the Cretaceous Hasandong Formation, Korea. Palaeogeography, Palaeoclimatology, Palaeoecology 157:213-225 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 38655: authorized by Matthew Carrano, entered by Matthew Carrano on 27.04.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Reptilia
 Dinosauria -
Dinosauria indet.
Dinosauria indet. dinosaur
"ornithoid egg-shell" (could be dinosaur or bird)