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Discussion on the Characteristics and Formation Age of the Reddish-yellow Semi-consolidation Deposits, West Coast of Korea: Comparison with the Ujeon Coast Deposits in Jeungdo

  • Journal of the Association of Korean Geographers
  • Abbr : JAKG
  • 2018, 7(1), pp.55-68
  • DOI : 10.25202/JAKG.7.1.5
  • Publisher : Association of Korean Geographers
  • Research Area : Social Science > Geography
  • Received : March 30, 2018
  • Accepted : April 16, 2018

Oh, Jeong-Sik 1

1고려대학교 지리교육과

Accredited

ABSTRACT

The purpose of this study is to clarify structure and formation age of the reddish-yellow semiconsolidation deposits on the Ujeon coast, and to compare with the reddish-yellow semi-consolidation deposits on the West Coast of the Korean Peninsula. As a result of the study, it was confirmed that the reddish-yellow semi-consolidation deposit observed on the Ujeon coast indicates two major formation ages. One is the basal sedimentary layer of the Ujeon coast, which has the same characteristics as the Late Pleistocene intertidal sediments (Ganweoldo Formation) that have been reported on the West Coast. The other one is identified as a sedimentary layer of paleo-beach formed during the relative high sea level of Holocene. Based on the characteristics of the basal sedimentary layer observed above the present L.M.S.L, it is presumed that the coastal dune area of the West Coast of the present day may have been the intertidal environment during the relative high sea level (MIS 5e) of the Late Pleistocene. Also, the reddish-yellow semi-consolidation deposits in the central part of the Ujeon coast, which were formed at the Climate Optimum of the Holocene, are also higher than the L.M.S.L. Therefore, it is confirmed as a key bed indicating that the West Coast has experienced a relatively high sea level during the Holocene.

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