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權五範,金重旭 大邱敎育大學校 科學敎育硏究所 1989 과학·수학교육연구 Vol.13 No.-
An analysis of frequency distribution, indicates that gravels in the Ch'??ongdo stream are mainly consist of andesitic volcanic rocks, granite and quartz porphyry in frequency. This occurrence frequency of rock each is well matched with the distribution area of each rock in the geologic map from the present erosion level. Rock type of gravels can be classified into andesite, andesitic porphyry, breccia bearing andesite, quartz porphyry and tuff. The distribution of gravel size suggests that the occurrence frequency of boulder and cobble is systematically changed toward the downstream, whereas that of pebble is randomly changed. The roundness of gravel is distinctly changed and is higher in the downstream site than in the upperstream site. The occurrence of angular gravel is relatively dominant than that of rounded gravel. This doninant angular gravel is due to either the poor current quantity of stream or the rocks transported from the near provenance of rocks. The geological material discussed here are recommended as the learning material for the observation and classification of gravels in 'rock and soil' unit of science textbook.
자연 교과에서 地域 地質素材의 活用에 관하여 : 지묘동 일대 암석을 중심으로 focusing on the rocks in Chimyo-dong area
金在慶,金重旭 大邱敎育大學校 科學敎育硏究所 1989 과학·수학교육연구 Vol.13 No.-
The field geologic materials which are applicable to the geology unit in science textbook are investigated in Chimyo-dong area. It is found that this area offers several unique advantages in topography and geology which are as follows. First, this area is geographically located in the suburbs of Taegu and thus is easily accessible by bus. Secondly, the principal rock units in this area are composed of conglomerate, sandstone, mudstone, shale, basalt, granite, and gneiss etc. Thirdly, many outcrops are topographically exposed along the road cut and streams crossing the rock units. These outcrops are densely spotted to narrow area of Chimyo-dong and show large three-dimensional views of tops or bottoms freshly. And finally, geological features and data of each site are applicable to the learning subjects in teacher's guidebook for the science textbook. It is suggested that Chimyo-dong area is very suitable to field trip for further understanding of the geology units in science textbook of primary school.