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Manam: Basalt / Picro-Basalt, Composite type, Stratovolcano.
Karkar: Andesite / Basaltic Andesite, Composite type, Stratovolcano.
Hankow Reef: No Data (checked), Composite type, Stratovolcano.
Long Island: Andesite / Basaltic Andesite, Composite type, Complex.
Umboi: Basalt / Picro-Basalt, Composite type, Complex.
Sakar: Basalt / Picro-Basalt, Composite type, Stratovolcano.
Ritter Island: Basalt / Picro-Basalt, Composite type, Stratovolcano.
Boisa: Basalt / Picro-Basalt, Composite type, Stratovolcano.
Bagabag: , Composite type, Stratovolcano.
Crown Island: , Composite type, Stratovolcano.
Tolokiwa: , Composite type, Stratovolcano.
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Note that to see the 'Geology' layer (layer options in top right corner) you may have to zoom out.
Many fabrics have a range of abundances. The range maximum (top) and minimum (bottom) are shown.
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| 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 |
| tpr459 ** | 2 | 2 | 3 | 4 | 0 | 3 | 0 | 0 | 0 | 0 | 0 | 4 | 0 | 0 | microphaneritic, microlitic, vitric |
| Madang pyroxenic lithic | 0 | 0 | 2 | 3 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 3 | 0 | 0 | PNG |
| tpr461 | 4 | 0 | 5 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | microphaneritic, microlitic |
| Madang feldspathic hybrid | 1 | 0 | 2 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | PNG |
| tpr274 ** | 1 | 1 | 3 | 6 | 1 | 2 | 0 | 0 | 0 | 0 | 0 | 3 | 0 | 0 | vitric, microlitic, lathwork |
| Huon pyroxenic | 0 | 0 | 1 | 5 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 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 |
| IL_1_88 | tpr459 (Madang pyroxenic lithic) | Tavultae | 0 | 0 | 3 | 3 | 0 | 3 | 0 | 0 | 0 | 0 | 0 | 4 | 0 | 0 | microphaneritic |
| IL_1_89 | tpr461 (Madang feldspathic hybrid) | Moap | 1 | 0 | 5 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | microphaneritic, microlitic |
| IL_1_91 | tpr459 (Madang pyroxenic lithic) | Bili Bili | 0 | 0 | 3 | 4 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 4 | 0 | 0 | microphaneritic |
| IL_1_92 | tpr274 (Huon pyroxenic) | Mindiri | 1 | 0 | 2 | 5 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 2 | 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.
Clay and temper mix. CAUTION: Section less than 30microns. Pyroxene grains (10%) are colourless to pale green, angular and less than 0.3 mm across. Feldspars (8%) are angular and about 0.2 mm across. Opaque minerals (5%) are angular to subrounded and 0.1 mm across. The rest of the material is a brown clay.
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.
"CAUTION: Section less than 30microns. The pyroxene (10%) is pale green, angular and up to 0.4 mm across. Plagioclase grains are angular and about 0.2 mm across. There are grains containing granular mosaics of quartz, feldspar and opaques up to 0.5 mm across. Opaque minerals are subrounded, and usually skeletal. The clay is a dark brown.
Pyroxene grains are colourless to pale green, angular to subrounded, about 0.3 mm across. There are minor of small angular quartz or feldspar, minor magnetite and minor shelly fragments. Minor volcanic rock fragments are set in the brown clay.