Also known as Hwajonri

Where: Gyeongsangbuk-do, South Korea (36.3° N, 128.7° E: paleocoordinates 44.4° N, 125.9° E)

• coordinate based on nearby landmark

• small collection-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: terrestrial; coarse-grained, gray, conglomeratic sandstone

Size class: macrofossils

Primary reference: 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 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 53802: authorized by Matthew Carrano, entered by Matthew Carrano on 14.09.2005

Creative Commons license: CC BY (attribution)