Mineral and Rock Abundances
| None (0) | Minor (1) | Few (2) | Common (3) | Frequent (4) | Major (5) | Very Dominant (6) |
| 0% | 0-5% | 5-15% | 15-30 % | 30-50% | 50-70% | 70-100% |
| Name | Cal. | Quartz | Feldspar | Pyroxene | Amphibole | Opaques | Olivine | Biotite | Muscovite | Epidote | Garnet/ Spinel | Ig./Met. Rocks | Sed. Rocks | Grog | Lithics/ Region |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Max | 0 | 0 | 2 | 2 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 6 | 0 | 0 | vitric, microlitic, felsitic |
| Min | 0 | 0 | 2 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 6 | 0 | 0 | Carolines |
Representative slides:
| Slide | Site | Possible Origin | Cal. | Quartz | Feldspar | Pyroxene | Amphibole | Opaques | Olivine | Biotite | Muscovite | Epidote | Garnet/ Spinel | Ig./Met. Rocks | Sed. Rocks | Grog | Lithics |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| WD_12_19 | Ulong Islet (Chelbacheb) | Babeldoab (or nearby) | 0 | 0 | 2 | 2 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 6 | 0 | 0 | vitric, microlitic, felsitic |
WD_12_19
Volcanic sand tempers, predominantly, polyminerallic volcanic rock fragments, with reddish vitric (glassy) groundmasses, but also some with microlitic and felsitic groundmass textures (all suitable for derivation from andesitic source rocks).