1992년 3월부터 1994년 10월에 걸쳐 수영강의 지류이며 대표적인 도시오염하천인 석대천의 깔따 구류 군집의 시,공간적 변화를 월별로 조사하였다. 조사 기간동안 총 44종의 깔따구류 유충이 채집 되었으며 비교적 수질이 깨끗한 지점의 우점종은 깃깔따구아과의 그네깃깔따구와 늪깔따구아과의 Conchapelopia melanops였으며 오염이 심한 지점에서의 우점종은 깔따구아과의 노랑털깔따구로 나타났다. 오염의 정도는 깔따구류 군집 변화에 영향을 주는 것으로 나타났는데 오염이 증가할수록 종 풍부도와 종 다양도가 감소하였으며 우점도는 증가하였다. 특히 깔따구류의 밀도는 강우의 영향을 많이 받는 것으로 나타났다. 깔따구류의 아과구성, 종 풍부도 및 노랑털깔따구의 상대밀도는 수질을 평가할 수 있는 척도가 될 수 있으며 특히 노랑털깔따구의 출현은 오염도와 높은 상관 관계를 나타내고 있어서 오염에 대한 지표종으로 사용될 수 있는 가능성을 시사하였다.

1994년부터 1996년도까지 계류성 독립하천인 웅천천 수계의 보령댐 수몰예정지역을 중심으로 하여 6개지점에서 어류상, 주목할만한 어종 및 어류군집에 대하여 조사하였다. 본 조사지역에서 94년에서 96년 사이에 채집을 통하여 서식이 확인된 종은 11과 25속으로 총 29종이었으며 이중 9종은 한국특산어종이었다. 이 중 멸종위기종인 감돌고기와 퉁사리, 특산어종인 꺽지는 본 지역에서 확인되지 않아 절멸된 것으로 생각된다. 우세어종은 갈겨니, 피라미, 긴몰개

The present study was carried out to know the distribution of freshwater mollusk on the Chinese liver fluke in the middle of August, 1997 at the upper area of Kyungan stream located in Yongin Kun, Kyungki province. The snails were collected from the shallow and irrigation route in a rural area located along the upper area of Kyungan stream. The snails collected by hand were brought to the laboratory and cercariae naturally shed from the snails, Parafossarulus manchouricus were examined. Parafossarulus manchouricus is medically important intermediate host of the transmission of digenetic trematoda to human. Each snail was placed in aerated tap water for the detection of cercariae and examined for expelled cercariae. Infection rate of the cercariae of Clonorchis sinensis was 3 (1.5%) among 195 individuals collected in the habitat. The identification of the cercaria of Clonorchis sinensis was performed as described by Komiya and Tajimi.

The granitic rocks in the southern part of the Kyeongsang basin, Korea, are divided into seven masses based on the petrographical features. They are generally characterized by shallow-depth intrusions. The chemical compositions of amphibole and biotite from the granitic rocks show systematic variations in Fe/(Fe+Mg) ratios as well as Mn and F contents. Hornblende geobarometer indicates low pressure condition (less than 2.3 kbar) at the time of final crystallization of hornblende crystals. The composition of biotite indicates that oxygen fugacity has been almost buffered during crystallization regardless of rock types. The oxygen fugacity is presumably close to the value of Ni-NiO buffer. From the Fe-Ti oxide geothermometry, it seems likely that most of the Fe-Ti oxides have been re-equilibrated during cooling and have suffered oxidation under subsolidus condition.

A previously unreported sedimentary complex has recently been discovered in the northern part of Choˇnsu Bay. It overlies both unconformably the Precambrian low-grade metamorphosed sedimentary sequence(Taean Formation) and the Jurassic biotite granite. The sedimentary complex is proposed to be designated as Choˇnsuman Formation. The Formation is composed of conglomerate, tuff, basalt, tuffbreccia, and shale. It is distributed in the northwest and northeast coasts of Choˇnsu Bay and in the Chukdo. Age of the Formation seems to be of late Mesozoic. The Choˇnsu sedimatary basin is considered to be originated by block faulting presumably during the Cretaceous, as suggested by the development of N-S trending structural lineation in the study area and its vicinity. The Chonsuman Formation seems to be formed by sedimantation in close association with block faulting and volcanic activities nearby. Sedimentation is thought to be developed from west to east in the basin.