THIN SECTION:	"U1301B-33R-1, 117-119 cm (Piece 22)"				TS #	50	Unit:7C	"OBSERVER: MS, RC"
ROCK NAME: 	Sparsely clinopyroxene-plagioclase phyric basalt							
WHERE SAMPLED:	Pillow interior							
GRAIN SIZE:	Cryptocrystalline							
TEXTURE:	"Intersertal, spherulitic, glomeroporphyritic"							
PRIMARY	PERCENT 	PERCENT	SIZE (mm)			APPROX.		
MINERALOGY	PRESENT 	ORIGINAL	min.	max.	av.	COMP.	MORPHOLOGY	COMMENTS
PHENOCRYSTS								
Plagioclase	2	2	0.5	2.5	1.8		Euhedral to subhedral	"Occurs singly, but is more common in monomineralic and bimineralic glomeroporphyritic clots with pyroxene."
Clinopyroxene	1	1	0.3	1.4	0.8		Subhedral to anhedral	"Present singly, and in glomeroporphyritic clots associated with plagioclase laths. "


GROUNDMASS								
Plagioclase	20	20		<0.5			Euhedral; lath	Microlaths and needles.
Clinopyroxene	5	5		<0.3			Euhedral to anhedral	
Olivine	0	3		<0.5			Subhedral	
Mesostasis	64	68						

SECONDARY			SIZE (mm)					
MINERALOGY	PERCENT		min.	max.	av.		REPLACING / FILLING	COMMENTS
Saponite	10						"Olivine, mesostasis, vesicles"	Fibrous to granular brown-green saponite.
Feox	1						"Olivine, vesicles"	
Pyrite	1						Mesostasis	
Iddingsite	1						Vein	

VESICLES/			SIZE (mm)					
CAVITIES	PERCENT	 LOCATION	min.	max.	av.		FILLING / MORPHOLOGY	COMMENTS
Vesicles	1	Even	0.1	1.2	0.6		"Saponite, Feox, carbnonate"	


COMMENTS : 	"Multi-halo. 5 mm brown zone adjacent to vein, 7% Feox+2% brown green saponite. 6 mm yellow zone: 7% Feox+2% green saponite+trace brown saponite. 5 mm green zone: 1% Feox, 2% brown saponite, 3% green saponite. Dark gray background alteration-7% pale tan brown saponite. Veins: In centre of brown halo, 0.1-0.2 mm Feox+ brown saponite vein, with narrow ""off-shoots"". 2nd 0.2 mm saponite + Feox vein."