THIN SECTION:	"U1301B-30R-1, 103-106 cm (Piece 21)"				TS #	46	Unit:7C	"OBSERVER: RC, MS"
ROCK NAME: 	Aphyric basalt							
WHERE SAMPLED:	Vein							
GRAIN SIZE:	Microcrystaslline							
TEXTURE:	"Intersertal, vesicular, vugs"							

PRIMARY	PERCENT 	PERCENT	SIZE (mm)			APPROX.		
MINERALOGY	PRESENT 	ORIGINAL	min.	max.	av.	COMP.	MORPHOLOGY	COMMENTS
PHENOCRYSTS								


GROUNDMASS								
Plagioclase	22	22		<0.5			Euhedral	Microlaths and needles.
Clinopyroxene	10	10		<0.3			Euhedral to anhedral	Occurs singly or attached to/intergrown with plagioclase.
Olivine	0	5		<0.3			Euhedral to subhedral	
Mesostasis	46	56						

SECONDARY			SIZE (mm)					
MINERALOGY	PERCENT		min.	max.	av.		REPLACING / FILLING	COMMENTS
Saponite	15						"Olivine, mesostasis, Vesicles"	Brown to green in color
Hematite/Feox	5						"Olivine, mesostasis, Vesicles"	
Iddingsite	2						"Olivine, mesostasis, Vesicles"	

VESICLES/			SIZE (mm)					
CAVITIES	PERCENT	 LOCATION	min.	max.	av.		FILLING / MORPHOLOGY	COMMENTS
Vesicles	2	Even	0.1	0.5	0.4		Saponite	
Vugs	5	Grouped	0.5	2.5	1.5		"Irregular, Feox"	
COMMENTS : 	"Green saponite in halo portion, brown saponite away from vugs."