Backarc (Q137391958)
Clinopyroxenes, plagioclase, and lithics of basalts or shoshonite (a basaltic trachyandesite), dominate.
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.
** Has full slide image available.
| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| tpr327 | 0 | 1 | 4 | 4 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 3 | 0 | 0 | felsitic, microphaneritic |
| Alofi andesitic | 0 | 1 | 4 | 4 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 3 | 0 | 0 | NE Melanesia |
| tpr324 | 0 | 1 | 5 | 4 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | microlitic, lathwork |
| Futuna feldspathic | 0 | 1 | 4 | 3 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | NE Melanesia |
| tpr325 | 0 | 1 | 4 | 4 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 4 | 0 | 0 | microlitic, lathwork |
| Futuna lithic | 0 | 1 | 3 | 3 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 3 | 0 | 0 | NE Melanesia |
| tpr326 | 0 | 1 | 3 | 4 | 0 | 4 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | microlitic, lathwork |
| Futana ferromagnesian | 0 | 1 | 2 | 3 | 0 | 4 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | NE Melanesia |
| tpr245 | 6 | 0 | 2 | 1 | 0 | 2 | 1 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | vitric, microlitic |
| Tikopia calcareous | 6 | 0 | 1 | 1 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | Vanuatu |
| Slide | Fabric | Possible Origin | Cal. | Quartz | Feldspar | Pyroxene | Amphibole | Opaques | Olivine | Biotite | Muscovite | Epidote | Garnet/ Spinel | Ig./Met. Rocks | Sed. Rocks | Grog | Lithics |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| WD_88_2 | tpr245 (Tikopia calcareous) | Tikopia | 6 | 0 | 2 | 1 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | vitric, microlitic |
Tikopia calcareous.