Shell zone and shell cuticula zone of Lake Biwa

Abstract

By the investigation in February, June and August of 1964, shell zone and shell cuticula zone were found in Lake Biwa.
The shell zone and the shell cuticula zone are situated at the depth, where the influence of wave does hardly reach.
The "plant debris zone" is formed a little deeper than the shell zone and shell cuticula zone.
The shell zone in east shore of the lake is situated deeper than that in west snore, because the dominant wind in this destrict is the north-west wind.