Fabric Code: tpr22

Saipan quartzose

Quartz and felspar (plagioclase) with traces of biotite.

Fabric Class:

Igneous Feldspathic: Dominated by igneous lithic inclusions with feldspars.

Andesitic Arc Quartzose Variant: Dominated by andesite and basalt lithic fragments, with microlitic, felsitic and vitric textures, and the andesite minerals (plagioclase, clinopyroxene and sometimes hornblende). With quartz.

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 1 3 4 2 0 2 0 1 0 0 0 4 0 0 vitric, felsitic
Min 0 3 3 1 0 1 0 1 0 0 0 3 0 0 Marianas

Representative slides:

Slide Site Possible OriginCal. QuartzFeldspar Pyroxene Amphibole Opaques OlivineBiotite Muscovite Epidote Garnet/ Spinel Ig./Met. Rocks Sed. Rocks Grog Lithics
WD_6_19 Mochong (Rota) Saipan 1 3 3 2 0 2 0 1 0 0 0 4 0 0 vitric, felsitic
WD_2_25 Laguas (Guam) Saipan 0 3 4 1 0 1 0 0 0 0 0 3 0 0 vitric, felsitic

WD_6_19

MochonRota_V MochonRota_V
Sherd MochonRota-V from Mochong (Rota). Slide WD_6_19 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.

Deeply weathered; Volcanic sand temper. Pre-latte sherd.


WD_2_25

GuamLaguas2 GuamLaguas2
Sherd Laguas2 from Laguas (Guam). Slide WD_2_25 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.

Sand temper likely derived from wares made on Saipan.


References:

323 Mariana, reports 1-15 for MTAT, 1998 (Dickinson, W.)