Kyushu / Name of sample: KA-6
| No. | District | Name of Pyroclastic Deposite | Age |
|---|---|---|---|
| 035 | Seiwa, Kamimashiki-gun, Kumamoto Pref. | Aso pumice flow | 20,000-36,000 |
Particle Size Distribution (wt%).
| -0.038mm | -0.075mm | -0.15mm | -0.3mm | -0.6mm | -1.18mm | -2.36mm | -4.75mm |
|---|---|---|---|---|---|---|---|
| 19.7 | 27.8 | 36.6 | 46.2 | 57.6 | 70.3 | 78.9 | 86.3 |
X-ray powder diffraction pattern.
(F: feldspar, Q: quartz, H: hypersthene, M: magnetite)
Chemical Compositions and Content of Volcanic Glass (wt%).
| SiO2 | Al2O3 | Fe2O3 | TiO2 | CaO | MgO | Na2O | K2O | Ig.loss | Total | Content of Volcanic Glass |
|---|---|---|---|---|---|---|---|---|---|---|
| 62.36 | 16.87 | 4.76 | 0.72 | 3.42 | 1.72 | 3.99 | 2.96 | 2.87 | 99.67 | 50.25 |
 XRD pattern of separated volcanic glass.  DTG pattern of separated volcanic glass. |
Chemical Compositions of Separated Vocanic Glass (wt%).
| SiO2 | Al2O3 | Fe2O3 | TiO2 | CaO | MgO | Na2O | K2O | Ig.loss | Total |
|---|---|---|---|---|---|---|---|---|---|
| 68.54 | 15.17 | 1.79 | 0.44 | 1.38 | 0.77 | 3.99 | 4.12 | 3.59 | 99.79 |