THIN SECTION:	"U1301B-23R-2, 45-47 cm (Piece 4)"				TS #	40	Unit:7B	"OBSERVER: RC, MS"
ROCK NAME: 	Highly olivine-clinopyroxene-plagioclase phyric basalt							
WHERE SAMPLED:	Pillow interior							
GRAIN SIZE:	Cryptocrystalline to microcrystalline							
TEXTURE:	"Hyalo-ophitic to intersertal, glomeroporphyritic"							
PRIMARY	PERCENT 	PERCENT	SIZE (mm)			APPROX.		
MINERALOGY	PRESENT 	ORIGINAL	min.	max.	av.	COMP.	MORPHOLOGY	COMMENTS
PHENOCRYSTS								
Plagioclase	8	8	0.7	4.4	1.5		Euhedral to subhedral	Solitary crystals or within glomeroporphyritic clots. Some glass inclusions are present.
Clinopyroxene	5	5	0.6	3	0.8		Euhedral to anhedral	Present singly and in glomeroporphyritic clots associated with plagioclase laths.
Olivine	0	2	0.6	2.8	1		Euhedral to subhedral	Completely replaced by green to pale brown saponite.

GROUNDMASS								
Plagioclase	25	25		<0.7			Euhedral	Microlaths.
Clinopyroxene	12	12		<0.6			Euhedral to anhedral	
Olivine	0	3		<0.6			Subhedral	
Mesostasis	45	46						Characterized by sheaf-spherulitic to plumose texture.

SECONDARY			SIZE (mm)					
MINERALOGY	PERCENT		min.	max.	av.		REPLACING / FILLING	COMMENTS
Saponite	3						"Olivine, mesostasis, vesicles"	Fibrous to granular brown-green saponite.
Feox + iddingsite	2						"Olivine, vesicles"	
Celadonite	2						Vesicles	

VESICLES/			SIZE (mm)					
CAVITIES	PERCENT	 LOCATION	min.	max.	av.		FILLING / MORPHOLOGY	COMMENTS
Vesicles	2	Even	0.3	1	0.6		"Saponite, Feox, celadonite"	



COMMENTS : 	"Three veins: 1. The interior of vein is missing, selvedge is saponite (0.3 mm); 2. Feox + Hematite + saponite vein (0.07 mm); 3. Feox + saponite vein."