Depositional environment of algal balls in the Ryukyu Group, Ryukyu Islands, southwestern Japan.

K. Minoura, T. Nakamori

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Fossil algal balls are abundant in limestones of the Pleistocene Ryukua Group. Their concentration forms a characteristic lithofacies, the algal ball limestone, which is an important component of the Ryukyu Group. Textural and paleontological examination indicate that these algal balls originated in a moat or lagoon, growing while they rolled about on the floor of a sandy channel, and finally accumulated on a gentle fore-reef slope. Some of them were brought by slumping or gravity flows to be included in biogenic detrital limestone accumulated on the fore-reef slope, together with those which originated in deeper water.-Authors

Original languageEnglish
Pages (from-to)602-609
Number of pages8
JournalJournal of Geology
Volume90
Issue number5
DOIs
Publication statusPublished - 1982 Jan 1

ASJC Scopus subject areas

  • Geology

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