THIN SECTION:	"U1301B-4R-1, 62-63 cm (Piece 9)"				TS #	6	Unit:1C	"OBSERVER: RC, MS"
ROCK NAME: 	Aphyric basalt							
WHERE SAMPLED:	Vein							
GRAIN SIZE:	Cryptocrystalline							
TEXTURE:	"Intersertal, vesicular, glomeroporphyritic"							
PRIMARY	PERCENT 	PERCENT	SIZE (mm)			APPROX.		
MINERALOGY	PRESENT 	ORIGINAL	min.	max.	av.	COMP.	MORPHOLOGY	COMMENTS
PHENOCRYSTS								



GROUNDMASS								
Plagioclase	24.9	24.9		<0.2			Euhedral; lath	Laths and needles.
Clinopyroxene	5.6	5.6		<0.2			Euhedral to anhedral	Occurs singly or attached to/intergrown with plagioclase.
Olivine	0	3		<0.2			Subhedral	Completely replaced by saponite + celadonite + Feox.
Mesostasis	54	59.5						

SECONDARY			SIZE (mm)					
MINERALOGY	PERCENT		min.	max.	av.		REPLACING / FILLING	COMMENTS
Saponite	5						"Olivine, mesostasis, vein, vesicles"	Brown to green color in the vesicles and olivine.
Celadonite	5						"Olivine, vesicles, vein"	Brown to green color in the vesicles and olivine.
FeO(OH)	1						"Olivine, vesicles, vein"	
Oparue  (Py?)	Tr						Mesostasis	

VESICLES/			SIZE (mm)					
CAVITIES	PERCENT	 LOCATION	min.	max.	av.		FILLING / MORPHOLOGY	COMMENTS
Vesicles	7	Even	0.1	1.2	0.5		"Saponite, Feox, celadonite"	



COMMENTS : 	"Alteration intensity is strong near the vein (= halo). Saponite in the halo is green in color. Veins filled with celadonite, Feox, and saponite. Celadonite seem to be associated with Feox or hematite. "