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한국지구과학회지 = Journal of the Korean Earth Science Society, v.35 no.7, 2014년, pp.501 - 517
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Based on a summary of the previous studies on columnar joints, this study presents research strategies and subjects to understand a formation of columnar joints, and its application in South Korea as follows; geometry of colonnade and entablature, formation mechanism and pattern change, surface morp...
| 핵심어 | 질문 | 논문에서 추출한 답변 |
|---|---|---|
| 주상절리 형태의 특징은? | 주상절리는 화산에서 분출된 뜨거운 용암이 냉각할 때 발생하는 1차적인 구조이다. 주상절리의 형태는 3각 기둥에서 8각 기둥까지 다양하지만 5-6각형이 가장 많다. 주상절리는 경관요소가 뛰어나 관광객도 선호하지만, 지질학자와 학생에게는 마그마의 종류에 따른 화산암의 산상을 학습하고, 주상절리가 형성되는 메커니즘을 이해하는 흥미로운 학습장이다. | |
| 우리나라는 주상절리를 어떻게 보호 관리하나? | 우리나라에서 경관이 뛰어난 주상절리는 문화재청이나 지자체에서 천연기념물, 지방문화재 또는 명승으로 지정하여 보호 관리되고 있다. 예를 들어, 중생대에 형성된 무등산 주상절리대(제465호), 경주 양남 읍천(제536호), 신생대 제4기의 제주도 대포동 주상절리(제443호)과 범섬-문섬(제421호), 한탄강 대교천 현무암협곡(제436호), 경기도 포천의 비둘기낭 폭포(제537호) 등은 천연기념물로 지정되어 잘 관리되고 있다. | |
| 용암이 고화되어 블록으로 나뉘는 균열의 최소 단위는 3개의 직선인 이유는? | 용암류가 냉각되면 상부 표면부터 수축되어 적당히 블록으로 나누어진다. 블록은 세 직선에 의해 분할될 때 에너지가 가장 적게 필요하다. 두 직선으로는 블록이 분할되지 못하고, 4개 이상이면 매우 많은 에너지가 필요하다(Gray, 1986). 따라서 용암이 고화되어 블록으로 나뉘는 균열의 최소 단위는 3개의 직선이다. |
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