Journal of The Geomorphological Association of Korea (한국지형학회지)

The Geomorphological Association of Korea (한국지형학회)
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Sedimentary Characteristics and Depositional Ages of Paleo-sand Dunes in Gaeul-ri, Baengnyeongdo Island

백령도 가을리에 분포하는 고(古)해안사구층의 특성과 형성 시기

  • Shin, Won Jeong (Department of Geography Education, Chungbuk National University) ;
  • Kim, Jong Yeon (Department of Geography Education, Chungbuk National University) ;
  • Lee, Jae Ho (Team of National Ecosystem Survey, National Institute of Ecology)
  • 신원정 (충북대학교 지리교육과) ;
  • 김종연 (충북대학교 지리교육과) ;
  • 이재호 (국립생태원 자연환경조사팀)
  • Received : 2020.06.20
  • Accepted : 2020.06.25
  • Published : 2020.06.30
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Abstract

The Baengnyeongdo-island, located at the northernmost point of the west coast, has developed several coastal landforms. Although the coastal landforms of Baengnyeongdo-island are widely used as a tourism resource, a lot of academic research has not been conducted. In this study, particle size analysis, XRF, and OSL age dating were performed on the BR sandy deposits to find out the formation of coastal sand dunes on Baengnyeongdo-island. Based on the physicochemical properties, the BR section was divided into three parts; BR-A, BR-B and BR-C. First, about 56ka, which corresponds to the MIS 3, fine sand was deposited and forms the BR-C section. Second, the BR-B which located middle part of BR section, showed reversed age stratigraphy. The BR-B was interpreted as reworked sediments based on sedimentary facies and chemical weathering intensity. And, the BR-A composed of fine and medium sands was formed in middle Holocene. This research has significance in that it finds out the paleo sand dunes formed in Pleistocene. This study can contribute to understanding coastal sand dune development on the west coast.

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Acknowledgement

이 논문은 2020년 대한민국 교육부의 재원으로 충북대학교 연수연구원 사업의 지원을 받아 연구되었습니다.