THIN SECTION:	"U1301B-12R-1, 56-58 cm (Piece 3c)"				TS #	23	Unit:2A	"OBSERVER: MS, RC"
ROCK NAME: 	Moderately clinopyroxene-olivine-plagioclase phyric basalt							
WHERE SAMPLED:	Vein							
GRAIN SIZE:	Microcrystalline to fine grained							
TEXTURE:	"Intergranular, glomeroporphyritic, seriate"							
PRIMARY	PERCENT 	PERCENT	SIZE (mm)			APPROX.		
MINERALOGY	PRESENT 	ORIGINAL	min.	max.	av.	COMP.	MORPHOLOGY	COMMENTS
PHENOCRYSTS								
Plagioclase	5	5	1	2.7	1.8		Euhedral to subhedral	Occurs singly and as mono- and poly-mineralic glomeroporphyritic clots with olivine + clinopyroxene.
Clinopyroxene	2	2	0.8	1.8	1.2		Subhedral to anhedral	Present as glomeroporphyritic clots associated with plagioclase laths.
Olivine	0	2	0.7	1.2	0.9		Subhedral to anhedral	Completely pseudomorphed  by brown saponite.

GROUNDMASS								
Plagioclase	45	45		<1			Euhedral	Microlaths and needles.
Clinopyroxene	33	33		<0.8			Anhedral	Occurs singly or attached to/intergrown with plagioclase.
Olivine	0	10		<0.7			Subhedral	
Opaque minerals	3	3						
SECONDARY			SIZE (mm)					
MINERALOGY	PERCENT		min.	max.	av.		REPLACING / FILLING	COMMENTS
Saponite	13						"Olivine, mesostasis, vein, vesicles"	Brown color in the vesicles and olivine phenocrysts.


VESICLES/			SIZE (mm)					
CAVITIES	PERCENT	 LOCATION	min.	max.	av.		FILLING / MORPHOLOGY	COMMENTS
Vesicles	Tr	Even	0.8	1.3	1		Saponite	



COMMENTS : 	0.05-0.1 mm-wide saponite filled vein.