Rota Island

Wikidata ID: Q949090

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

Geonames ID: 4041523       Getty Thesaurus of Geographic Names ID: 1008811

Mindat Loc ID: 440695

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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
tpr6 ** 0 1 5 2 0 2 0 0 0 0 0 4 0 0 microlitic, felsitic, vitric
Marianas andesitic 0 0 4 1 0 2 0 0 0 0 0 3 0 0 Marianas
tpr21 ** 0 0 2 2 0 2 0 0 0 0 0 6 0 0 vitric, microlitic
Guam lithic hi andesitic 0 0 1 1 0 1 0 0 0 0 0 6 0 0 Marianas
tpr22 1 3 4 2 0 2 0 1 0 0 0 4 0 0 vitric, felsitic
Saipan quartzose 0 3 3 1 0 1 0 1 0 0 0 3 0 0 Marianas
tpr23 6 1 1 0 0 1 0 0 0 0 0 0 0 0 na
Mariana calcareous 6 0 0 0 0 1 0 0 0 0 0 0 0 0 Marianas
tpr25 0 0 0 0 0 2 0 0 0 0 0 6 0 0 vitric
Guam vitric 0 0 0 0 0 2 0 0 0 0 0 6 0 0 Marianas
tpr5 ** 0 4 3 0 0 1 0 0 0 0 0 6 0 0 vitric, felsitic
Saipan dacitic 0 2 1 0 0 0 0 0 0 0 0 4 0 0 Marianas
tpr7 6 3 1 0 0 2 0 0 0 0 0 1 0 0 felsitic
Saipan hybrid quartz 6 1 1 0 0 0 0 0 0 0 0 1 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_4 tpr6 (Marianas andesitic) Marianas 0 0 5 2 0 1 0 0 0 0 0 3 0 0 microlitic, felsitic, vitric
WD_8_1 tpr21 (Guam lithic hi andesitic) Guam 0 0 2 1 0 2 0 0 0 0 0 6 0 0 vitric
WD_6_19 tpr22 (Saipan quartzose) Saipan 1 3 3 2 0 2 0 1 0 0 0 4 0 0 vitric, felsitic
WD_6_20 tpr23 (Mariana calcareous) Mariana 6 0 1 0 0 1 0 0 0 0 0 0 0 0 na
WD_5_3 tpr6 (Marianas andesitic) Marianas 0 0 4 2 0 1 0 0 0 0 0 4 0 0 vitric, microlitic, felsitic
WD_8_3 tpr25 (Guam vitric) Guam 0 0 0 0 0 2 0 0 0 0 0 6 0 0 vitric
WD_2_22 tpr5 (Saipan dacitic) Saipan 0 2 1 0 0 0 0 0 0 0 0 6 0 0 vitric
WD_5_1 tpr6 (Marianas andesitic) Marianas 0 0 5 2 0 2 0 0 0 0 0 3 0 0 microlitic, felsitic, vitric
WD_6_16 tpr7 (Saipan hybrid quartz) Saipan 6 3 1 0 0 0 0 0 0 0 0 1 0 0 felsitic

WD_5_4

Asmatmos_FC2 Asmatmos_FC2
Sherd FC2 from Asmatmos (Rota). Slide WD_5_4 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 sand tempers of andesitic character. Latte sherd. Clinopyroxene dominant, but minor orthopyroxene.


WD_8_1

MochongRotaI MochongRotaI
Sherd MochongRotaI from Mochong (Rota). Slide WD_8_1 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.


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_6_20

MochonRota_VI MochonRota_VI
Sherd MochonRota-VI from Mochong (Rota). Slide WD_6_20 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.

Calcareous sands. Pre-latte sherd.


WD_5_3

RotaII RotaII
Sherd RotaII from Mochong (Rota). Slide WD_5_3 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.

Marianas Plainware. Volcanic sand temper. Clinopyroxene dominant, but minor orthopyroxene.


WD_8_3

NECRotaR19 NECRotaR19
Sherd NECRotaR19 from Rota (NEC) (Rota). Slide WD_8_3 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.

Poorly sorted, subangular to subrounded, andesitic volcanic sand temper rich in glassy volcanic rock fragments of tan to brown hues in thin section.


WD_2_22

RotaR117 RotaR117
Sherd RotaR117 from Rota (NEC) (Rota). Slide WD_2_22 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.

Quartzose glass-rich volcanic sand temper.


WD_5_1

Rota_R_23 Rota_R_23
Sherd Rota-R-23 from Rota (NEC) (Rota). Slide WD_5_1 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.

Poorly sorted, subangular to subrounded, andesitic volcanic sand temper rich in glassy volcanic rock fragments of tan to brown hues in thin section. Clinopyroxene dominant, but minor orthopyroxene.


WD_6_16

RotaR14 RotaR14
Sherd RotaR14 from Rota (NEC) (Rota). Slide WD_6_16 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.

Hybrid calcareous-quartz beach sand temper.


References:

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

067 Rota, Mariana 1977 (Dickinson, W.)