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고인석,이용태,신영식,Koh In Seok,Lee Yong Tae,Shin Young Sik 한국석유지질학회 1996 한국석유지질학회지 Vol.4 No.1
백악기 의성소분지 북동부 하양층군 (일직층, 후평동층, 점곡층)에서 관찰된 방향성 퇴적구조는 하도구조, 곡상사층리, 판상사층리, 사엽층리 및 유수연흔 등이다. 이들 퇴적구조들은 주로 세립사암으로부터 역질의 극조립사암에 발달한다. 대소규모의 하도구조는 모든 층에서 ,하도구조와 곡상사층리는 일직층 (충적선상지 환경)에서 , 판상사층리 , 판상사엽층리 , 유수연흔은 후평동층 (범람원 환경)과 점곡층 (호수변 환경) 하부에서 자주 관찰된다. 연구지역에서 측정한 4깨의 방향성 퇴적구조들의 벡타평균 방향은 $290^{\circ}C$며 표준편차는 $\pm68$이다. 주된 고수류의 흐름은 서북서 방향을 지시하며. 퇴적물의 기원지는 연구지역으로 부터 동남동 방향의 어느 곳에 있었음을 시사한다 Directional sedimentary structures (channel structure, cross stratification, and current ripple) were observed in fine to gravelly ye.y coarse sandstones of the Cretaceous Mayans Group (lljig, Hupyeongdong, and Jeomgok formations) in the northeastern part of Euiseong subbasin of Kyongsang basin, Southeast Korea. Large and small scale channel structures are common in all formations. Trough cross-stratification and channel structure frequently occur in the lljig formation (proximal fluvial deposit), whereas planar cross- stratification, cross lamination, and current ripple occur abundantly in the Hupyeongdong and Jeomgok formations (distal braided fluvial to marginal lacustrine deposits). The paleocurrent directions inferred from a statistical analysis of total 43 directional sedimentary structures show a mean azimuth of $290^{\circ}C$ with a standard deviation of $\pm68$. It suggests that the main flow of the paleocurrents moved toward the WNW direction and the source area of the sediments would be located somewhere in the ESE direction beyond the study area.
의성분지(義城盆地) 북부(北部) 백악기(白堊紀) 사암(砂岩)의 조직(組織)
고인석 ( In Seok Koh ) 경북대학교 과학교육연구소 1982 科學敎育硏究誌 Vol.6 No.-
The Cretaceous sandstone of northern part of the Euiseong basin has been studied in terms of sedimentary environment through grain size parameters. A part of the results has been compared with that of Daegu section in the Milyang basin. The sandstone has finning upward trend as same as that of Daequ section in its grain size distribution even though an exception is found in the l jig formation. It is coarser, more well-sorted, more rounded in grain shape, compared with that of Daegu admixture than fine admixture, compared with that of Daegu section because average skewness of the sandstone of the Nagdong gxoup in the studied area is 0.06 whereas that of Daegu section 0.11 and also interpreted to have been deposited on a marginal part of the sedimentary basin because the majority of skewness are positive. The bivariant test of Friedman (1967) and Moiola & Weisser (1968) show that it had been deposited on a fluvio-lacustrine environment. The vertical profile in environmental reconstruction (visher 1965) also shows the characteristics of fluvial or valley fill models, partially presenting some characteristics of piedmont deposits and fang lomerate. The majority of the sand grains have been transported by means of rolling and suspension (passega 1964) under moderate energy environment because most of the grains are mesokurtic in kurtosis.