9:30 AM - 9:45 AM
[HQR05-03] Environmental change from diatom analysis since MIS7~MIS8 in the Omoikawa lowland, the Kanto plain
Keywords:diatom analysis, Omoikawa
The core, 60 m long, is composed of 3 sand and mud layers (A,C,E) and 3 gravel layers (B,D,F), as A to F from the top to the bottom.
From Unit A, two 14C ages in Holocene were obtained. Diatom analysis for Unit A indicated freshwater environment.
Diatom analyses for Unit C showed mainly inner bay environment, along with marine to brackish tidal environments. It is supported by sulfur analysis. Unit C is probably correlated to MIS5e.
Unit D, gravel layer below Unit C, may be MIS6.