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http://dx.doi.org/10.5467/JKESS.2017.38.2.141

SHRIMP U-Pb Ages of Dinosaur and Bird Footprints found in Cretaceous Formation of Saok Island, Jeollanam-do, South Korea  

Kim, Cheong-Bin (Department of Physics Education, Sunchon National University)
Kim, Uijin (Jeonnam Science High school)
Park, Minsu (Science Education Center for Gifted Youth, Sunchon National University)
Hwang, Koo-Geun (Suncheon Seungju Middle school)
Lee, Keewook (Division of Environmental and Material Sciences, Korea Basic Science Institute)
Publication Information
Journal of the Korean earth science society / v.38, no.2, 2017 , pp. 141-149 More about this Journal
Abstract
The geology of Saok island area in Jeollanam-do can be divided into 4 lithologic types: Jurassic granite, Cretaceous sedimentary rocks, acidic tuff and acidic dikes. In the Saok island area, dinosaur and web-footed bird footprints, arthropod trackway and silicified wood were found recently in the Cretaceous sedimentary rocks which composed of alternating light grey sandstone, shale and mudrock. The fossil-bearing sedimentary rock is overlain by an acidic tuff, and the sedimentary rock and acidic tuff are cut by acidic dykes. In order to constrain the depositional age of the Cretaceous sedimentary rocks in Saok island area, SHRIMP U-Pb zircon ages were determined in the tuffaceous sandstone and overlying acidic tuff. Zircon U-Pb ages of the sandstone and tuff are $83.58{\pm}0.86$ and $79.80{\pm}0.75Ma$, respectively, which belong to the Campanian of the Late Cretaceous. The U-Pb age of the acidic tuff indicates the eruption time of acidic tuff and thus the minimum age of the fossil-bearing sedimentary rocks in this area. Therefore, the formation age of the dinosaur and web-footed bird footprints can be constrained between 83.6 and 79.8 Ma.
Keywords
dinosaur footprint; web-footed bird tracks; SHRIMP U-Pb ages; Late Cretaceous;
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Times Cited By KSCI : 5  (Citation Analysis)
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