Site: Nomna Bay

Island: Guam       Lithology: Composite high island ( Nunn et al. (2016) )

Lithology and Age: None ( Chorlton (2007) )       Macrostrat Geological Map Link

Near/In Geonames ID: 7869917       Wikidata ID: Q22950163       Getty Thesaurus of Geographic Names ID: None

Mindat Loc ID: None


In:

Guam Island Wikidata ID: Q16635

Mariana Islands Wikidata ID: Q153732

Note that to see the 'Geology' layer (layer options in top right corner) you may have to zoom out.


Fabrics:

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
tpr16 6 0 1 0 0 1 0 0 0 0 0 1 0 0 na
Guam calcareous 6 0 0 0 0 0 0 0 0 0 0 0 0 0 Marianas
tpr18 4 0 2 5 0 2 0 0 0 0 0 3 0 0 vitric, felsitic
Guam hybrid 2 0 1 3 0 1 0 0 0 0 0 2 0 0 Marianas
tpr20 0 0 3 3 0 3 0 0 0 0 0 6 0 0 vitric, microlitic
Guam lithic andesiitic 0 0 1 1 0 1 0 0 0 0 0 5 0 0 Marianas

Slides:

Slide Fabric Possible OriginCal. QuartzFeldspar Pyroxene Amphibole Opaques OlivineBiotite Muscovite Epidote Garnet/ Spinel Ig./Met. Rocks Sed. Rocks Grog Lithics
WD_5_17 tpr16 (Guam calcareous) Guam 6 0 0 0 0 0 0 0 0 0 0 0 0 0 na
WD_5_14 tpr18 (Guam hybrid) Guam 4 0 2 4 0 2 0 0 0 0 0 2 0 0 felsitic, vitric
WD_5_7 tpr18 (Guam hybrid) Guam 4 0 2 3 0 2 0 0 0 0 0 2 0 0 felsitic, vitric
WD_5_15 tpr20 (Guam lithic andesiitic) Guam 0 0 3 2 0 3 0 0 0 0 0 5 0 0 vitric

WD_5_17

Nomna-11 has a full slide scan available (user: Guest pwd: Guest). Imaged by K. Hardy and M. Leclerc, ANU.

Calcareous.


WD_5_14

Nomna-8 has a full slide scan available (user: Guest pwd: Guest). Imaged by K. Hardy and M. Leclerc, ANU.

Hybrid lithic.


WD_5_7

Ma_GU_23_2 Ma_GU_23_2
Sherd Ma-GU-23-2 from Nomna Bay (Guam). Slide WD_5_7 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.

Volcanic calcareous temper.


WD_5_15

Nomna-9 has a full slide scan available (user: Guest pwd: Guest). Imaged by K. Hardy and M. Leclerc, ANU.

Lithic volcanic sand.


References:

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

027 Nomna Bay, Guam 1968 (Dickinson, W.)