Tutuila

Wikidata ID: Q269205

Lithology and Age: Cenozoic mafic-intermediate volcanic rocks ( Chorlton (2007) )       Macrostrat Geological Map Link

Geonames ID: 5881087       Getty Thesaurus of Geographic Names ID: 1009538

Mindat Loc ID: 405510


Volcanoes:

Tutuila: Basalt / Picro-Basalt, Cluster type, Tuff cone(s).

brown pot Site has a full slide image.

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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
tpr294 ** 0 0 0 1 0 1 1 0 0 0 0 6 0 0 vitric
Samoan colluvium 0 0 0 0 0 0 0 0 0 0 0 6 0 0 Samoa
tpr290a ** 0 0 5 0 0 2 0 0 0 0 0 6 0 0 microlitic, vitric
Samoan crushed microlitic lithic 0 0 3 0 0 0 0 0 0 0 0 4 0 0 Samoa
tpr295 ** 0 0 1 5 0 3 4 0 0 0 0 6 0 0 lathwork, vitric
Samoan ferromagnesian beach 0 0 0 3 0 1 2 0 0 0 0 3 0 0 Samoa
tpr293a ** 0 0 1 0 0 0 0 0 0 0 0 6 0 0 felsitic
Samoan felsitic trachytic 0 0 0 0 0 0 0 0 0 0 0 6 0 0 Samoa
tpr294a ** 0 0 1 1 0 0 1 0 0 0 0 6 0 0 lathwork, microlitic
Samoan basaltic lithic A 0 0 1 0 0 0 0 0 0 0 0 6 0 0 Samoa
tpr294b ** 0 0 0 0 0 0 0 0 0 0 0 6 0 0 microlitic
Samoan basaltic lithic B 0 0 0 0 0 0 0 0 0 0 0 6 0 0 Samoa
tpr294c ** 0 0 1 0 0 0 1 0 0 0 0 6 0 0 lathwork, microlitic
Samoan basaltic lithic C 0 0 0 0 0 0 1 0 0 0 0 6 0 0 Samoa
tpr294d ** 0 0 1 0 0 0 1 0 0 0 0 6 0 0 lathwork, microlitic
Samoan basaltic lithic D 0 0 1 0 0 0 1 0 0 0 0 6 0 0 Samoa

Slides:

Slide Fabric Possible OriginCal. QuartzFeldspar Pyroxene Amphibole Opaques OlivineBiotite Muscovite Epidote Garnet/ Spinel Ig./Met. Rocks Sed. Rocks Grog Lithics
WD_25_14 tpr294 (Samoan colluvium) Samoa 0 0 0 0 0 0 1 0 0 0 0 6 0 0 vitric, lathwork
WD_25_11 tpr293a (Samoan felsitic trachytic) Samoa 0 0 1 0 0 0 0 0 0 0 0 6 0 0 felsitic
WD_22_23 tpr294 (Samoan colluvium) Samoa 0 0 4 0 0 1 1 0 0 0 0 6 0 0 vitric
WD_22_12 tpr290a (Samoan crushed microlitic lithic) Samoa 0 0 5 0 0 1 0 0 0 0 0 4 0 0 microlitic, lathwork, vitric
WD_22_13 tpr290a (Samoan crushed microlitic lithic) Samoa 0 0 5 0 0 1 0 0 0 0 0 4 0 0 lathwork, microlitic
WD_22_14 tpr290a (Samoan crushed microlitic lithic) Samoa 0 0 3 0 0 1 0 0 0 0 0 6 0 0 lathwork, microlitic
WD_22_15 tpr290a (Samoan crushed microlitic lithic) Samoa 0 0 4 0 0 1 0 0 0 0 0 6 0 0 lathwork, microlitic
WD_22_18 tpr290a (Samoan crushed microlitic lithic) Samoa 0 0 4 0 0 1 0 0 0 0 0 6 0 0 lathwork, microlitic
WD_22_11 tpr290a (Samoan crushed microlitic lithic) Samoa 0 0 4 0 0 1 0 0 0 0 0 5 0 0 microlitic, victric, lathwork
WD_25_13 tpr294 (Samoan colluvium) Samoa 0 0 0 0 0 1 0 0 0 0 0 6 0 0 vitric
WD_79_1 tpr294a (Samoan basaltic lithic A) Olomoana Mountain Tutuila 0 0 1 1 0 0 0 0 0 0 0 6 0 0 microlitic, lathwork
WD_79_10 tpr294b (Samoan basaltic lithic B) Olomoana Mountain Tutuila 0 0 0 0 0 0 0 0 0 0 0 6 0 0 microlitic
WD_79_11 tpr294b (Samoan basaltic lithic B) Olomoana Mountain Tutuila 0 0 0 0 0 0 0 0 0 0 0 6 0 0 microlitic
WD_79_15 tpr294c (Samoan basaltic lithic C) Olomoana Mountain Tutuila 0 0 1 0 0 0 1 0 0 0 0 6 0 0 microlitic, lathwork
WD_79_16 tpr294c (Samoan basaltic lithic C) Olomoana Mountain Tutuila 0 0 0 0 0 0 1 0 0 0 0 6 0 0 lathwork, microlitic
WD_79_17 tpr294c (Samoan basaltic lithic C) Olomoana Mountain Tutuila 0 0 0 0 0 0 1 0 0 0 0 6 0 0 lathwork, microlitic
WD_79_19 tpr294d (Samoan basaltic lithic D) Olomoana Mountain Tutuila 0 0 1 0 0 0 1 0 0 0 0 6 0 0 lathwork, microlitic
WD_79_20 tpr294d (Samoan basaltic lithic D) Olomoana Mountain Tutuila 0 0 1 0 0 0 1 0 0 0 0 6 0 0 lathwork, microlitic
WD_79_6 tpr294a (Samoan basaltic lithic A) Olomoana Mountain Tutuila 0 0 1 0 0 0 1 0 0 0 0 6 0 0 microlitic, lathwork
WD_79_9 tpr294b (Samoan basaltic lithic B) Olomoana Mountain Tutuila 0 0 0 0 0 0 0 0 0 0 0 6 0 0 microlitic, lathwork
WD_87_24 tpr294a (Samoan basaltic lithic A) Olomoana Mountain Tutuila 0 0 1 0 0 0 0 0 0 0 0 6 0 0 microlitic, lathwork
WD_87_10 tpr294a (Samoan basaltic lithic A) Olomoana Mountain Tutuila 0 0 1 1 0 0 0 0 0 0 0 6 0 0 lathwork, microlitic
WD_87_3 tpr294a (Samoan basaltic lithic A) Olomoana Mountain Tutuila 0 0 1 1 0 0 0 0 0 0 0 6 0 0 microlitic, lathwork
WD_87_12 tpr294a (Samoan basaltic lithic A) Olomoana Mountain Tutuila 0 0 1 0 0 0 0 0 0 0 0 6 0 0 microlitic, lathwork
WD_87_16 tpr294a (Samoan basaltic lithic A) Olomoana Mountain Tutuila 0 0 1 0 0 0 0 0 0 0 0 6 0 0 microlitic, lathwork
WD_87_17 tpr294a (Samoan basaltic lithic A) Olomoana Mountain Tutuila 0 0 1 0 0 0 0 0 0 0 0 6 0 0 microlitic, lathwork
WD_87_18 tpr294a (Samoan basaltic lithic A) Olomoana Mountain Tutuila 0 0 1 0 0 0 0 0 0 0 0 6 0 0 microlitic, lathwork
WD_87_4 tpr294a (Samoan basaltic lithic A) Olomoana Mountain Tutuila 0 0 1 1 0 0 0 0 0 0 0 6 0 0 microlitic, lathwork

WD_25_14

Aoa_AS_4 Aoa_AS_4
Sherd AS4 from ‘Aoa Valley (Tutuila). Slide WD_25_14 from Dickinson Collection, Bishop Museum. x4 Magnification PPL (left) XPL (right). Scale bar: 0.5mm. High resolution image or full slide in VIMIPO (user: Guest pwd: Guest). Imaged by K. Hardy and M. Leclerc, ANU.

Weathered.


WD_25_11

Aoa_AS_15 Aoa_AS_15
Sherd AS15 from ‘Aoa Valley (Tutuila). Slide WD_25_11 from Dickinson Collection, Bishop Museum. x4 Magnification PPL (left) XPL (right). Scale bar: 0.5mm. High resolution image or full slide in VIMIPO (user: Guest pwd: Guest). Imaged by K. Hardy and M. Leclerc, ANU.

Trachytic.


WD_22_23

Aoa_AS_7 Aoa_AS_7
Sherd AS7 from ‘Aoa Valley (Tutuila). Slide WD_22_23 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.

Vacuoles suggest the past presence of calcareous inclusions.


WD_22_12

Aoa_AS_1 Aoa_AS_1
Sherd AS1 from ‘Aoa Valley (Tutuila). Slide WD_22_12 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.

Basaltic temper.


WD_22_13

Aoa_AS_2 Aoa_AS_2
Sherd AS2 from ‘Aoa Valley (Tutuila). Slide WD_22_13 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.

Crushed rock temper.


WD_22_14

Aoa_AS_3 Aoa_AS_3
Sherd AS3 from ‘Aoa Valley (Tutuila). Slide WD_22_14 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.

Basaltic lithic temper.


WD_22_15

Aoa_AS_12 Aoa_AS_12
Sherd AS12 from ‘Aoa Valley (Tutuila). Slide WD_22_15 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.

Basaltic lithic temper.


WD_22_18

Aoa_AS_16 Aoa_AS_16
Sherd AS16 from ‘Aoa Valley (Tutuila). Slide WD_22_18 from Dickinson Collection, Bishop Museum. x4 Magnification PPL (left) XPL (right). Scale bar: 0.5mm. High resolution image or full slide in VIMIPO (user: Guest pwd: Guest). Imaged by K. Hardy and M. Leclerc, ANU.

Basaltic.


WD_22_11

Tagaga_3 Tagaga_3
Sherd 3 from Tataga-Matau (Tutuila). Slide WD_22_11 from Dickinson Collection, Bishop Museum. x4 Magnification PPL (left) XPL (right). Scale bar: 0.5mm. High resolution image or full slide in VIMIPO (user: Guest pwd: Guest). Imaged by K. Hardy and M. Leclerc, ANU.

Basaltic rock fragments have glassy groundmass with plagioclase laths and altered pyroxene and olivines.


WD_25_13

Toaga_4 Toaga_4
Sherd 4 from Tataga-Matau (Tutuila). Slide WD_25_13 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.

Sparse temper.


WD_79_1

Tula_199A Tula_199A
Sherd 199A from Tula (Tutuila). Slide WD_79_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.

Intersertal with tachylitic glass and subordinate hyalopilitic. A3.


WD_79_10

Tula_182_21D Tula_182_21D
Sherd 182-21D from Tula (Tutuila). Slide WD_79_10 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.

Intersertal to intergranular (fluidal fabric).


WD_79_11

Tula_182_21B Tula_182_21B
Sherd 182-21B from Tula (Tutuila). Slide WD_79_11 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.

Intersertal to intergranular (fluidal fabric).


WD_79_15

Tula_139_15B Tula_139_15B
Sherd 139-15B from Tula (Tutuila). Slide WD_79_15 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.

Intergranular with minor hyalopilitic


WD_79_16

Tula_142_16 Tula_142_16
Sherd 142-16 from Tula (Tutuila). Slide WD_79_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.

Intergranular with minor hyalopilitic.


WD_79_17

Tula_161_18Aa Tula_161_18Aa
Sherd 161-18A from Tula (Tutuila). Slide WD_79_17 from Dickinson Collection, Bishop Museum. x4 Magnification PPL (left) XPL (right). Scale bar: 0.5mm. High resolution image or full slide in VIMIPO (user: Guest pwd: Guest). Imaged by K. Hardy and M. Leclerc, ANU.

Intergranular with minor hyalopilitic


WD_79_19

Tula_139_15A Tula_139_15A
Sherd 139-15A from Tula (Tutuila). Slide WD_79_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.

Subophitic with minor hyalopilitic.


WD_79_20

Tula_161_18F Tula_161_18F
Sherd 161-18F from Tula (Tutuila). Slide WD_79_20 from Dickinson Collection, Bishop Museum. x4 Magnification PPL (left) XPL (right). Scale bar: 0.5mm. High resolution image or full slide in VIMIPO (user: Guest pwd: Guest). Imaged by K. Hardy and M. Leclerc, ANU.

Subophitic with minor hyalopilitic.


WD_79_6

Tula_161_18D Tula_161_18D
Sherd 161-18D from Tula (Tutuila). Slide WD_79_6 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.

Intersertal to intergranular with minor hyalopilitic.


WD_79_9

Tula_182_21H Tula_182_21H
Sherd 182-21H from Tula (Tutuila). Slide WD_79_9 from Dickinson Collection, Bishop Museum. x4 Magnification PPL (left) XPL (right). Scale bar: 0.5mm. High resolution image or full slide in VIMIPO (user: Guest pwd: Guest). Imaged by K. Hardy and M. Leclerc, ANU.

Intersertal to intergranular (fluidal fabric).


WD_87_24

Tula_196_24A Tula_196_24A
Sherd 196-24A from Tula (Tutuila). Slide WD_87_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.

Intersertal with tachylitic glass and subordinate hyalopilitic. A3.


WD_87_10

Tula_190_23_a Tula_190_23_a
Sherd 190-23 from Tula (Tutuila). Slide WD_87_10 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.

Intersertal to intergranular with minor hyalopilitic.


WD_87_3

Tula_145_17D Tula_145_17D
Sherd 145-17D from Tula (Tutuila). Slide WD_87_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.

Intersertal to intergranular with minor hyalopilitic.


WD_87_12

Tula_145_17A Tula_145_17A
Sherd 145-17A from Tula (Tutuila). Slide WD_87_12 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.

Intersertal to intergranular with minor hyalopilitic.


WD_87_16

Tula_161_181 Tula_161_181
Sherd 161-18I from Tula (Tutuila). Slide WD_87_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.

Intersertal to intergranular with minor hyalopilitic.


WD_87_17

Tula_174_19B_a Tula_174_19B_a
Sherd 174-19B from Tula (Tutuila). Slide WD_87_17 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.

Intersertal to intergranular with minor hyalopilitic.


WD_87_18

Tula_174_19D Tula_174_19D
Sherd 174-19D from Tula (Tutuila). Slide WD_87_18 from Dickinson Collection, Bishop Museum. x4 Magnification PPL (left) XPL (right). Scale bar: 0.5mm. High resolution image or full slide in VIMIPO with higher exposure. Imaged by K. Hardy and M. Leclerc, ANU.

Intersertal to intergranular with minor hyalopilitic.


WD_87_4

Tula_161_18B Tula_161_18B
Sherd 161-18B from Tula (Tutuila). Slide WD_87_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.

Intersertal to intergranular with minor hyalopilitic.


References:

298 Tula, Tutuila, American Samoa, 2011 (Dickinson, W.)

096 Tataga-Matau Fort, American Samoa 1988 (Dickinson, W.)

112 'Aoa Valley, Tutuila, American Samoa 1994 (Dickinson, W.)