Table 2. Elemental composition of surface (0–2 cm layer) sediments (%). The value was obtained as weight composition.
| Site | Fe | Mn | Ti | Ca | K | Al | Si |
|---|---|---|---|---|---|---|---|
| Takayashiki | 29 | 1 | 3 | 6 | 9 | 10 | 42 |
| Oyado | 34 | 0 | 4 | 6 | 7 | 8 | 41 |
| Netsupami–ike | 35 | 1 | 2 | 6 | 11 | 6 | 39 |
| Matsuzawakami–ike | 36 | 1 | 4 | 8 | 8 | 8 | 36 |