Fabric Code: tpr392

Rotuma olivine lithic

Indigenous. Not orthopyroxene. Brown vitric, or lathwork lithic. Contains 2 different types, one (vitric) from Noatau Scoria bedrock, and another, inter granular from Oinafa basalts.

Sites:

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. QuartzFeldspar Pyroxene Amphibole Opaques OlivineBiotite Muscovite Epidote Garnet/ SpinelIg./Met. Rocks Sed. Rocks Grog Lithics/ Region
Max 0 0 2 2 0 1 3 0 0 0 0 6 0 0 vitric, lathwork
Min 0 0 2 0 0 0 2 0 0 0 0 5 0 0 Fiji

Representative slides:

Slide Site Possible OriginCal. QuartzFeldspar Pyroxene Amphibole Opaques OlivineBiotite Muscovite Epidote Garnet/ Spinel Ig./Met. Rocks Sed. Rocks Grog Lithics
WD_111_1 Rotuma (Rotuma) Rotuma 0 0 2 2 0 1 2 0 0 0 0 6 0 0 lathwork

WD_111_1

Rotuma_57_10 Rotuma_57_10
Sherd 57-10 from Rotuma (Rotuma). Slide WD_111_1 from Dickinson Collection, Bishop Museum. x4 Magnification PPL (left) XPL (right). Scale bar: 0.5mm. High resolution image (user: Guest pwd: Guest) or full slide in VIMIPO. Imaged by K. Hardy and M. Leclerc, ANU.

High ratio olivine to pyroxene. Indigenous temper. Intergranular textured lithics typical of alkalic basalt lava. Only clinopyroxene, no orthopyroxene.


References:

135 Rotuma 1997 (Dickinson, W.)

131 Rotuma 1996 (Dickinson, W.)