Multiple Tracksites with Parallel Trackways from the Cretaceous of the Yeosu City Area Korea: Implications for Gregarious Behavior in Ornithopod and Sauropod Dinosaurs

作者：Lockley Martin G^*; Huh Min; Gwak Se Geon; Hwang Koo Geun; Paik In Sung

来源：Ichnos-an International Journal for Plant and Animal Traces, 2012, 19(1-2): 105-114.

DOI：10.1080/10420940.2011.625793

• Cretaceous
• Korea
• Ornithopod
• Sauropod
• Footprints

At least six sites with multiple parallel ornithopod trackways and one site with three parallel sauropod trackways have been mapped in the track-rich Cretaceous sequence on Sado and Chudo islands, Yeosu City area, South Korea. A preliminary study of the stratigraphic context of these tracks indicates that they were made by gregarious subadult or adult dinosaurs that frequented lake basin settings subject to a cyclic depositional regime and periodic ash fall. Bird and theropod dinosaur tracks also occur in the sequence. Mapped sites reveal between 4 and 14 regularly spaced, ornithopod trackways suggestive of herding behavior. One site reveals an 84 m-long trackway, the longest on record for an ornithopod. Only one site reveals parallel sauropod trackways indicating three animals of equal size traveling eastwards with an inter-trackway spacing of about 2.25-2.5 m. The footprints show well preserved pes claw impressions, slightly wide gauge and largemanus/pes ratios ( low heteropody). The sedimentological and ichnofaunal sequences share some similarities with the famous Jindong successions 50 km to the east, but they also differ significantly in age and ichnofaunal composition.

• 出版日期2012