THIN SECTION:	"U1301B-23R-3, 21-24 cm (Piece 4)"				TS #	39	Unit:7B	"OBSERVER: MS, RC"
ROCK NAME: 	Highly olivine-clinopyroxene-plagioclase phyric basalt							
WHERE SAMPLED:	Vein							
GRAIN SIZE:	Cryptocrystalline							
TEXTURE:	"Hyalo-ophitic, spherulitic, glomeroporphyritic"							
PRIMARY	PERCENT 	PERCENT	SIZE (mm)			APPROX.		
MINERALOGY	PRESENT 	ORIGINAL	min.	max.	av.	COMP.	MORPHOLOGY	COMMENTS
PHENOCRYSTS								
Plagioclase	10	10	0.2	3.3	1.4		Euhedral to subhedral	Laths and stubby crystals; occur singly and within monomineralic glomeroporphyritic clots; minor simple zoning.
Clinopyroxene	7	7	0.2	1.5	0.7		Euhedral to anhedral	Present singly and in glomeroporphyritic clots associated with plagioclase laths.
Olivine	0	3	0.2	3.2	1		Euhedral to subhedral	Completely replaced by green to pale brown saponite.

GROUNDMASS								
Plagioclase	10	10		<0.2			Euhedral	Microlaths.
Clinopyroxene	3	3		<0.2			Euhedral to anhedral	
Olivine	0	2		<0.2			Subhedral	
Mesostasis	66	67						Characterized by sheaf-spherulitic to plumose texture.

SECONDARY			SIZE (mm)					
MINERALOGY	PERCENT		min.	max.	av.		REPLACING / FILLING	COMMENTS
Saponite	5						"Olivine, mesostasis, vesicles"	Fibrous to granular brown-green saponite.
Feox	2						"Olivine, vesicles"	
Ceradonite	Tr						Vesicles	

VESICLES/			SIZE (mm)					
CAVITIES	PERCENT	 LOCATION	min.	max.	av.		FILLING / MORPHOLOGY	COMMENTS
Vesicles	2	Even	0.1	0.9	0.6		"Saponite, Feox, celadonite"	



COMMENTS :