• Economic and Environmental Geology
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• v.12 no.1
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• pp.17-28
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• 1979

Geodetic and geophysical quantities related to gravity data are analyzed using three-dimensional sin x/x method for the southern part of the Korean peninsula and adjacent Japan Sea. The thickness of isostatic crust is found as 26 km. The average isostatic gravity anomaly in this area is appeared to be +24.8 mgal, of which result indicates that the surface features are under-compensation or the thickness of the crust is thinner than normal. It is noteworthy that the general trend of the deflections of the vertical in direction is nearly perpendicular to the geological structure having a direction of NNE-SSW in the southern part of Korea.

• Economic and Environmental Geology
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• v.39 no.4 s.179
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• pp.385-402
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• 2006

Paleomagnetic studies have made remarkable contributions to the understanding of many geological aspects of Korea for the last 40 years, such as the collisional processes of Korean Peninsula, the development of basins in relation with fault systems, the opening and evolution of the East Sea, and the reconstruction of paleogeographic configuration. These contributions have played an important role in the escalation of geology in Korea by elucidating the mechanisms on Processes of fragmentation and amalgamation of the Peninsula, mountain building, igneous activities, metamorphism, and folding and faulting based on the view of plate tectonics. This paper is intended to introduce and summarize the paleomagnetic research papers designed to decipher the tectonic processes of Korea, according to the geologic ages of the studied rocks.

• Journal of the Speleological Society of Korea
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• v.6 no.7
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• pp.2-7
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• 1981

제주도는 한반도의 최남단에 위치하고 환태평양조선대 즉, 호상열도에서 벗어난 대륙쪽에 있는 하나의 큰 화산도로서 백두산, 울릉도와 함께 지질학적으로 매우 흥미있는 대상이다. (table omitted) 본도는 제3기말 플라이오세에서부터 제4기에 이르는 동안의 화산활동의 산물로서 형성되었으며 화산지형으로서의 지형적 특징을 잘 나타내고 있다.(중략)

• Proceedings of the Korean Geotechical Society Conference
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• 2004.03a
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• pp.134-145
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• 2004

전남은 한반도의 서남부를 차지하는 지역으로 동북으로는 높은 산지에 의해 서남으로는 바다에 의해 확연히 구분된 지역이다. 전남의 북부는 전북의 고창, 순창군에 연접해 있으며, 동부는 경남의 하동, 남해군 등과 인접해 있다. 전남의 경위도상 위치를 보면 극동에는 여수시 남면 연도리 작도, 극서에는 신안군 흑산면 소흑산도, 극남에는 완도군 소안면 장수리, 극북에는 장성군 북하면 신성리에 위치해 있다.(중략)

• Journal of the Korean Geographical Society
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• v.35 no.3
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• pp.389-400
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• 2000

20세기 초에 고토가 설정한 우리나라의 산맥체계는 지질학적 증거의 뒷받팀이 부족했다. 그후 일본 지질학자들은 그의 산맥체계에 수정을 가하게 되었으나, 수정은 그가 설정한 틀의 범위내에서 이루어졌다. 중.고등학교 지리교과서의 산맥지도가 보여주는 산맥에는 두 종류가 있다. 하나는 지반의 융기에 의해 형성된 태백.소백.낭림.함경산맥으로 산세가 웅장하고 산줄기가 분명하며, 한반도의 골격을 이루고 있다. 다른 하나는 태백.낭림의 척량산맥에서 서해안까지 길게 뻗어내린 갈비뼈 모양의 산맥들이다. 중국방향 및 랴오뚱방향의 이들 산맥은 경동지형의 고위평탄면이 해체되는 과정에서 형성된 것으로 연속성이 약하고 구간에 따라서는 확인하기 어려우며, 처음부터 잘못 설정된 거이다. 산맥지도는 산지의 분포를 보여주는 것인데. 척량산맥 서쪽에는 이들 산맥과 관계없이 분포하는 산지가 오히려 더 많다. 산맥지도에는 하천도 그려져 있으나 하천은 산맥에 가려서 잘 드러나지 않는다. 갈비뼈모양의 산맥을 아예 없애고 그 대신 하천을 뚜렷하게 그려 넣어도 훌륭한 지도가 만들어진다. 하천은 오늘날 수자원으로서 매우 중요하다.

• Journal of the Korean earth science society
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• v.43 no.6
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• pp.680-690
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• 2022

Tephrochronology uses regional tephra for age dating and stratigraphic correlations. Regional tephras are important in Quaternary geology and archaeology because they can be used as stratigraphic time-markers. In this review, identification and dating methods of tephra are summarized. In addition, the characteristics of regional tephras in terrestrial deposits of the Korean Peninsula are elaborated, and geological applications and limitations of the regional tephra layers are also discussed. So far, AT, Ata, and Kb-Ks tephra layers from Kyushu, Japan have been found in Pleistocene paleosol, marine terrace deposits, and lacustrine deposits in Korea. Also, although not officially confirmed, Aso-4 tephra is likely to occur in terrestrial deposits. The regional tephra layers are vital for dating, especially with regard to sediments over 50 ka beyond the range of radiocarbon dating, and for dating of active faults. Furthermore, it can provide important information for preparing countermeasures against volcanic disasters. However, in order to use the tephra layer geologically, it must be confirmed whether it is a primary deposit based on sedimentological study.

• Journal of the Korean earth science society
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• v.43 no.3
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• pp.464-479
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• 2022

In this study, appropriate geosites for geological field trips were explored and measures for their effective utilization in education were discussed, focusing on Okseo-myeon, Sanbuk-dong, Bieung-do, Yami-do, Sinsi-do, and Seonyu-do areas in Gunsan City, Korea. To this end, we analyzed the geological learning elements of the curriculum that were revised in 2015 and selected 7 geosites through field work based on prior research on the study areas. These areas have immense potential as a rich source of information on the Mesozoic geology of the Korean Peninsula, including igneous rocks formed as a consequence of Jurassic and Cretaceous igneous activities, Cretaceous sedimentary rocks, dinosaur footprints, plant fossils, ripple marks, and folds. When the learning elements available at the geosites were compared to those of the curriculum, they contained essentials used in high grade of elementary school and high school, and in particular, they had most of the learning elements used in high school. Accordingly, educational activities that can be carried out in each of the geosites in Gunsan City were proposed.

• The Journal of Engineering Geology
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• v.5 no.3
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• pp.309-329
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• 1995

Seismicity and stress state in the Korean peninsula are studied using the catalogue of historical earthquakes and that from the seismological observations before the 1960s, with the aid of instrumental catalogue up to 1995. It seems that the completeness of the historical catalogue has a significant enhancement during the first two hundred years of the Yi dynasty, i.e., from the 1400s to the 1600s. From then on the catalogue may be regarded as near to complete for strong earthquakes in an overall sense. From the distribution of strong earthquakes, three seismic zones may be identified. From the south to the north, those are the southern seismic zone (남부지진대), the Seoul-Pyongyang seismic zone (서울-평양지진대), and the northern seismic zone (북부지진대). The mechanisms of some earthquakes obtained using first motion read- ings are reevaluated with a grid testing method. The results indicate that the compressional axis is nearly horizontal along the EW direction.

• Economic and Environmental Geology
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• v.48 no.1
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• pp.77-88
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• 2015

Advanced geological surveys and exploration activities were first carried out in Korea in 1884 in accordance with a treaty of friendship and commerce between Great Britain and Korea and a treaty of friendship and commerce between Germany and Korea. The first paper by Gottsche, C. was also published in a German Journal in 1886. Efforts toward independent acquisition of Western geological survey and exploration technology were actively promoted by the Korean Empire in the early 1900s, but were frustrated by the Japanese Empire. Systematic geological surveys and exploration were conducted in Korea by Japanese geologists during the Japanese occupation. A basic geological maps(61sheets), a bulletin on the geological survey of Korea, a bulletin and technical report on deposits in Korea, and a coalfield geological survey report were published during this period. Overall, the intentions under lying the geological surveys and exploration activities by foreigners in Korea prior to the Japanese occupation were questionable. However, the results of these surveys and explorations themselves can be evaluated as positive in terms of academic performance.

• Proceedings of the KSEEG Conference
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• 2003.04a
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• pp.302-305
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• 2003

진안-장수지역 (이하 본 역)은 한반도를 구성하는 중요한 지괴인 영남육괴 지리산지역의 북서부와 옥천지향사대의 동남연변부에 위치한 곳으로 두 지괴의 경계면을 따라 압쇄작용으로 형성된 순창전단대가 분포하며 지질시대와 암석학적 특징이 상이한 여러 화성암체가 나타난다. 본 연구지역의 지질은 지리산 편마암복합체를 기반으로 선캠브리아기의 변성퇴적암류, 신암리섬암, 장수화강편마암, 선각산화강편마암 그리고 쥬라기의 대성리엽리상화강암, 순창엽리상화강암과 남원화강암으로 구성된다. (중략)