| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| tpr460 | 0 | 2 | 5 | 2 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 4 | 0 | 0 | microlitic, microphaneritic |
| Madang feldspathic lithic | 0 | 0 | 4 | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 3 | 0 | 0 | PNG |
| Slide | Fabric | Possible Origin | Cal. | Quartz | Feldspar | Pyroxene | Amphibole | Opaques | Olivine | Biotite | Muscovite | Epidote | Garnet/ Spinel | Ig./Met. Rocks | Sed. Rocks | Grog | Lithics |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| IL_1_90 | tpr460 (Madang feldspathic lithic) | Yabob | 0 | 0 | 5 | 2 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 3 | 0 | 0 | microlitic |
The plagioclase grains (20%) are angular and about 0.3 mm across. Pyroxene grains are colourless to green, angular and less than 0.3 mm in diameter. They make up about 5% of the sample. Volcanic rock fragments (10%), up to 0.5 mm across, are generally weathered and contain clay and feldspar microlites. The opaque minerals (<5%) are angular to subrounded and about 0.2 mm across. There is rare redbrown ferruginized pellets and spinel. The clay is yellow-red-brown.