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. QuartzFeldspar Pyroxene Amphibole Opaques OlivineBiotite Muscovite Epidote Garnet/ SpinelIg./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

All slides available for those fabrics:

Slide Fabric Possible OriginCal. QuartzFeldspar Pyroxene Amphibole Opaques OlivineBiotite 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

WD_88_2

Tikopia48_6 Tikopia48_6
Sherd 48-6 from Tikopia (Tikopia). Slide WD_88_2 from Dickinson Collection, Bishop Museum. x4 Magnification PPL (left) XPL (right). Scale bar: 0.5mm. High resolution image in VIMIPO (user: Guest pwd: Guest). Imaged by K. Hardy and M. Leclerc, ANU.

Tikopia calcareous.