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 | 5 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | microphaneritic, microlitic |
| Min | 1 | 0 | 2 | 0 | 0 | 1 | 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_1_89 | Moap (Png) | Moap | 1 | 0 | 5 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | microphaneritic, microlitic |
| IL_1_39 | Sio (Png) | Madang | 4 | 0 | 2 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | microlitic, microphaneritic |
IL_1_89
CAUTION: Section less than 30microns. Mainly angular plagioclase feldspar grains (20%) about 0.2mm across which are partly sericitized . Some shelly fragments (<1%) are elongate to subrounded and up to 1 mm. Volcanic rock fragments (<5%) are mainly plagioclase rich consisting of microlites , minor clay and opaques. These grains are between 00.1 and 0.3 mm across. There are small granular mosaics about 0.25nm across (5%) of quartz and feldspar. The opaque minerals (<1%) are subrounded and green.
IL_1_39
Madang style sherd. CAUTION: Section less than 30microns. Plagioclase (5%), volcanic rock fragments (<5%), ferruginized pellets and accessory shell fragments are all less than 0.6 m in diameter. The clay is red brown and contains abundant fine grained quartz, feldspar and iron oxides.