Fabric Code: tpr213

Santo beach

Sand temper in which plagioclase and clinopyroxene mineral grains and lithic fragments of microlitic to vitric andesitic rock are the prominent grain types. Some clasts are skeletal calcareous grains of modern reef derivation. Well sorted and subrounded. Clinopyroxene dominant, but minor orthopyroxene.

Fabric Class:

Pyroxenic-Igneous: Dominated by pyroxenic and igneous lithic inclusions.

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

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.	Quartz	Feldspar	Pyroxene	Amphibole	Opaques	Olivine	Biotite	Muscovite	Epidote	Garnet/ Spinel	Ig./Met. Rocks	Sed. Rocks	Grog	Lithics/ Region
Max	1	0	5	6	1	2	0	0	0	0	0	3	0	0	microlitic, vitric, felsitic
Min	0	0	1	2	1	1	0	0	0	0	0	2	0	0	Vanuatu

Representative slides:

Slide	Site	Possible Origin	Cal.	Quartz	Feldspar	Pyroxene	Amphibole	Opaques	Olivine	Biotite	Muscovite	Epidote	Garnet/ Spinel	Ig./Met. Rocks	Sed. Rocks	Grog	Lithics
WD_57_12	Santo (Santo)	Santo	1	0	5	2	1	1	0	0	0	0	0	3	0	0	microlitic, vitric
WD_57_17	Santo (Santo)	Santo	0	0	1	6	1	1	0	0	0	0	0	2	0	0	microlitic, vitric

WD_57_12

Sand temper in which plagioclase and clinopyroxene mineral grains and lithic fragments of microlitic to vitric andesitic rock are the prominent grain types. some clasts are skeletal calcareous grains of modern reef derivation (well sorted and subrounded).

WD_57_17

Sand temper in which plagioclase and clinopyroxene mineral grains and lithic fragments of microlitic to vitric andesitic rock are the prominent grain types. Clinopyroxene dominant, but minor orthopyroxene.

References:

259 Santo, Vanuatu, 2007 (Dickinson, W.)