• Title/Summary/Keyword: 비대칭 유상습곡

Search Result 1, Processing Time 0.015 seconds

Determination of Flow Direction from Flow Indicators in the Muposan Tuff, Southern and Eastern Cheongsong, Korea (청송 남.동부 무포산응회암의 흐름 지시자로부터 유향 결정)

  • Ahn, Ung-San;Hwan, Sang-Koo
    • Economic and Environmental Geology
    • /
    • v.40 no.3 s.184
    • /
    • pp.319-330
    • /
    • 2007
  • The Muposan Tuff is a stratigraphic unit which is distinguished as a cooling unit in the volcanic rocks of the northeastern Kyeongsang Basin. The Muposan Tuff commonly belongs to tuff field according to the granulometric classification and to vitric tuffs according to the constituent classification. The tuffs are mostly densely to partially welded to include very flattened and sometimes stretched pumices and shards, and involve several flow indicator and lateral gradings in maximum diameter and content of their constituents. Movement pattern from flow lineation, lithic and pumice imbrications, asymmetric flow folds, and lateral gradings in maximum diameter and content of their constituents indicate that the Muposan Tuff had a source from the southeastern part.