대구광역시 북구 노곡동에서 산출되는 백악기 함안층의 공룡발자국
Dinosaurs tracks of the cretaceous Haman Formation Revealed Nogok-dong Buk-gu, Daegy City, Korea
공룡발자국 대구광역시 백악기;
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Out of total 15 horizons of the Cretaceous Haman Formation at around Nogok-dong, Buk-gu, Daegu city, 77 tracks were revealed of which Sauropod tracks are 77, Ornithopod, 10, and Theropod, 6. In case of Sauropod track, more than 3 trackway appeared. On the face of mudstone over sandstone, multi-angled mudcrack was revealed from 14 horizons, ripple, from 7 horizons, and various types of trace fossil, from 14 horizons. Sauropod tracks were revealed from all of the 15 horizons excepting the 11th and the 13th horizon, Ornithopod, from the 2nd, 4th, 8th, 11th and 13th horizon, and Theropod, from the 1st, 2nd and 9th horizon. As for the size of the Sauropod track, F1 in manus was 16-24 ㎝, Fw in manus, 29-45 ㎝, F1 in pes, 27-61 ㎝, and Fw in pes, 18-59 ㎝. As for the size of the Theropod track, F1 was 12-36 ㎝ and Fw, 6-28 ㎝. As for the size of the Ornithopod track, F1 was 25-40 ㎝ and Fw, 20-33 ㎝. The trackway of Sauropod suggests that the hip height is about 150-222 ㎝, track speed is 9.6-12.9 ㎞/h and the pattern of track is walking. The structure of deposit such as Dinosaur track fossil, trace fossil, ripple and mudcrack appeared alternately, that means the region or the stratum was formed in the environment of deposit at the edge of a shallow inland lake. It is considered that the stratum was formed, in the process, repeatedly submerging or surfacing until reaching to the state of mudcrack.