Comparison samples (4 samples)

| No. | Name | District | Name of pyroclastic deposit | Age | Particle size distribution | Chemical composition | XRD pattern | DTG pattern |
|---|---|---|---|---|---|---|---|---|
| 059 | AO-1 | Wadatohge, Nagano Pref. | Obsidian | ? | - | in sheet | - | in sheet |
| 060 | AO-2 | Cidamar, Bogor, West Java, Indonesia | Obsidian | ? | - | in sheet | - | - |
| 061 | AO-3 | Samarang, Garut, West Java, Indonesia | Obsidian | ? | - | in sheet | - | - |
| 062 | AP-1 | Arita, Nishimatsuura-gun, Saga Pref. | Perlite | ? | - | in sheet | - | in sheet |