Slide: WD_7_24

Andesitic temper sand rich in glassy volcanic rock fragments and lacking any calcareous grains indicative of coastal origin.

Mineral and Rock Abundances

Fabric: tpr21 - Guam lithic hi andesitic

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%
Cal. QuartzFeldspar Pyroxene Amphibole Opaques OlivineBiotite Muscovite Epidote Garnet/ Spinel Ig./Met. Rocks Sed. Rocks Grog Lithics
0 0 2 1 0 1 0 0 0 0 0 6 0 0 vitric

Images

guam_IPA1 guam_IPA1
Sherd IPA1 from Ipan Beach (Guam). Slide WD_7_24 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.

Sherd: IPA1

None

Period: None wikidata:

Site: Ipan Beach (Guam)

Suspected origin site: Guam

References:

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

204 Guam, Mariana, 2001 (Dickinson, W.)