Tsunami deposits in a lacustrine sequence of the Sanriku coast, northeast Japan

Koji Minoura, Shu Nakaya, Masao Uchida

Research output: Contribution to journalArticle

111 Citations (Scopus)

Abstract

Lacustrine deposits of the Pacific coast of northeast Japan, consisting mostly of black organic mud, contain intercalated thin beds of well-sorted medium sand. Examination of the deposits from a coastal site of Sanriku has revealed that sand grains are of marine origin and are fractions of deposits in marshy ponds, transported from the littoral environment by a great flooding of seawater. The mode of sedimentation shown in the thin beds of sand implies that they were deposited by tsunamis, each with a maximum rise of 1 m or more above sea level.

Original languageEnglish
Pages (from-to)25-31
Number of pages7
JournalSedimentary Geology
Volume89
Issue number1-2
DOIs
Publication statusPublished - 1994 Feb

ASJC Scopus subject areas

  • Geology
  • Stratigraphy

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