Cheong-Bin Kim

The Valuation of Geosites and Geoheritages in the Buan Volcanics of Byeonsanbando National Park

This study aims analyze the geological values in relation to the volcanic area and to investigate a possibility of the geosites and the geoheritages in Byeonsanbando area. The results indicate that the seven geosites are relevant as a potential national geopark, including Gunghang, Solseom Island, and Mohang located in Oebyeonsan and Jikso Falls, Gulbawi, Seongye Falls, and Ulgumbawi located in Naebyeonsan. Solseom Island and Mohang should be preserved and used as a place of the geological study because of their high geological heritage values. Besides, Jeokbyeokgang and Chaeseokgang are famous for excellent natural landscapes as they have been proven with academic values. Like this, these area are considered to have sufficient value as a national geopark of Korea, because their geoheritages are variously distributed in Byeonsanbando area.

Paleostress from calcite twins of limestone and its tectonic implication in South Korea

In order to examine paleostress and tectonic implications, calcite twins in limestone distributed in South Korea were used. The average twin thickness and intensity increase with increasing the total twin strain. Calcite twins in the study area as an indicator of deformation temperature might be produced at temperatures lower than 200°C approximately, being considered for the total twin strain, the average twin thickness and intensity and morphology of calcite. The maximum shortening axes calculated from calcite twins show the NE-SW or NEE-SWW, NW-SE or NWW-SEE and N-S or NNW-SSE directions. These maximum shortening directions are consistent with many fault directions developing in the study area, in particular with the NE-SW main tectonic direction in the Korean Peninsula. Paleostress results from present and other previous studies suggest that the NE-SW maximum shortening direction during the Late Permian to Early Triassic Songrim orogeny in the Korean Peninsula can be compatible with the Indosinian orogeny in China and the Sangun orogeny in the Japanese Island. The NW-SE maximum shortening direction during the Jurassic to Early Cretaceous Daebo orogeny can be compatible with the Yanshanian orogeny in China and the Hida orogeny in the Japanese Island and the N-S maximum shortening direction during the Late Cretaceous to Early Tertiary Bulgugsa orogeny can be compatible with the Sichuanian orogeny in China.

Paleostress from Healed Microcracks and Fluid Inclusions in Quartz of the Jurassic Granites in the Southwestern Ogcheon Folded Belt

Paleostress was interpreted by analyzing the healed microcracks and the secondary fluid inclusions in quartz of the Jurassic granites distributed in the southwestern Ogcheon Folded Belt, South Korea. The most dominant direction of healed microcracks in the study area was oriented , and direction was also recognized. The formation temperatures of fluid inclusions were ranged and the age of healed microcrack formations might have been approximately 166-200 Ma. Comparing the paleostress orientation obtained from the direction of healed microcracks to the formation age of healed microcracks estimated from the secondary fluid inclusions, it is considered that granitic rock body in study area was subject to a maximum horizontal principal stress along the NNW-SSE and WNW-ESE directions in the early Jurassic to middle Jurassic.

Late Cretaceous to Early Tertiary Paleostress from Healed Microcracks of Cretaceous Granites in Goheung Area, Jeonnam

Late Cretaceous to early Tertiary paleostress was evaluated by analyzing the healed microcracks in the Cretaceous granite of the Goheung area, south Korea. Healed microcracks in five granite samples (GH-1, GH-3, GH-4, GH-5, GH-8) were investigated and measured according to direction. The directions of maximum horizontal principal stress in GH-1, GH-3, and GH-4 are dominantly , while minor directions are N-S and . In GH-5 and GH-8, are the most dominant directions, while is the minor direction. Thus overall, the most dominant directions of healed microcracks in the study area are oriented , while minor directions are oriented , essentially NE. Combining the paleostress results of this study with other studies, the direction of the maximum horizontal principal stress in the study area during the late Cretaceous to the early Tertiary should perhaps be changed WNW to NE. The reason for this is thought to be the complex tectonic movements which occurred in northeast Asia at that time.

Geoheritages and geosites of the Gochang-gun and the Buan-gun areas, Korea

본 연구는 고창군과 부안군 일대의 지질유산과 지질명소를 보고하고 국가지질공원의 가능성을 제언하고자 한다. 조사 결과 부안지역의 대항리 화강편마암, 적벽강과 채석강의 백악기 퇴적암, 솔섬, 모항, 위도의 백악기 화산암류 등 6곳과 고창지역에서 하전갯벌, 소요산, 선운산, 병바위의 백악기 화산암류, 운곡습지와 고인돌군, 명사십리해빈과 구시포 편마암과 화강암 등 6곳, 총 12곳의 지질명소를 제안하였다. 이상의 지질명소는 해안가를 따라 분포하고 있어 경관적 가치와 지질학적 가치가 뛰어나며, 학술적 가치가 높은 갯벌과 서해안의 직선형 해안가를 따라 조간대와 해안사구가 발달하는 특징 등은 다른 국가지질공원과 구별되는 양상을 보여주고 있어, 국가지질공원으로서 충분한 가능성이 있다고 판단된다.

Response of High School Students on Development of Gradually-Processing Completion Concept Map and It's Application - Case Study on 'Diastrophism in Earth Science I'-

In this study, a new teaching model was developed using concept maps and applied to the Earth Science I unit on diastrophism. We analyzed the effects of this model on students` scholastic achievement, ability to construct concept maps, and attitudes towards concept map lessons, in comparison to traditional teaching methods. The data was sampled from 128 second-year male high school students in Gyunggido, Korea. Although the results are not statistically significant, the new teaching model seems to have contributed to an increase in scholastic achievement as opposed to the traditional teaching models. We also found that the students to whom the new teaching model was applied showed both significant and positive effects in terms of scholastic achievement, the ability to construct a concept map, and changes in attitudes towards concept map lessons.

A Development of Earth Science Learning Materials Using Paleolithic Remains and Its Applications

This study developed earth science learning materials based on paleolithic remains in the Youngsan River basin to provide students with curiosity and interest of science. These materials consist of four activities such as orientation, tour of museum, field trip to paleolithic sites, and making of remains. More than 60% of the teachers said that these materials are likely to improve the scientific process skills of students and also suggested that these could be applied to club activity, field trip, and homework. In addition, materials seemed to help students to understand the properties of the mineral and rock. We suggested that these materials could broaden teachers` subject of teaching in science.