Fig. 7From: Genesis of the columnar joints from welded tuff in Mount Mudeung National Geopark, Republic of KoreaConcordia diagrams showing calculated U-Pb ages from concordant zircon for Mt. Mudeung (Ipseok-dae: 84.73 ± 0.81 Ma; Seoseok-dae: 85.82 ± 0.84 Ma; Gwangseok-dae: 85.41 ± 0.58 Ma; and Chotdae-bong: 87.72 ± 0.59 Ma). The analysis error ellipses are 1σBack to article page