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 | 4 | 0 | 4 | 3 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 3 | 0 | 0 | lathwork, microlitic |
| Min | 3 | 0 | 3 | 3 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | PNG |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| IL_2_8 | Tuam (Tuam) | ? | 3 | 0 | 3 | 3 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | lathwork, microlitic |
| IL_2_7 | Tuam (Tuam) | ? | 4 | 0 | 4 | 3 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 3 | 0 | 0 | lathwork, microlitic |
IL_2_8
Lapita style. CAUTION: Section less than 30microns. This sample contains colourless to pale green pyroxene crystals (10%) up to 0.4 mm in length. Angular feldspar grains are up to 0.3 mm in length and there is less than 5%. There are rare grains of volcanic rock fragments up to 0.4 mm across, elongate to rounded ferruginized clasts of clay up to 2 mm in length, and carbonate shell fragments, about 0.5 mm across.
IL_2_7
Lapita sherd. CAUTION: Section less than 30microns. This sample is similar to 8/1 but contains more and larger shelly fragments and fewer and smaller pyroxene grains. Volcanic rock fragments are up to 0.8 mm in length and consist of small feldspar crystals and opaque particles set in a glassy groundmass.