THIN SECTION:	"U1301B-21R-2, 126-128 cm (Piece 17)"				TS #	37	Unit:7B	"OBSERVER: MS, RC"
ROCK NAME: 	Highly olivine-clinopyroxene-plagioclase phyric basalt							
WHERE SAMPLED:	Vein							
GRAIN SIZE:	Cryptocrystalline							
TEXTURE:	"Spherulitic, hyalo-ophitic, glomeroporphyritic, pilotaxitic, vesicular"							
PRIMARY	PERCENT 	PERCENT	SIZE (mm)			APPROX.		
MINERALOGY	PRESENT 	ORIGINAL	min.	max.	av.	COMP.	MORPHOLOGY	COMMENTS
PHENOCRYSTS								
Plagioclase	5.4	5.4	0.8	2.7	1.2		Euhedral	"Stubby laths, and in mono- and poly-mineralic glomeroporphyritic clots. Pale green or brown glass inclusions in the cores."
Clinopyroxene	3.5	3.5	0.8	3.8	2		Euhedral to anhedral	"Occurs singly, but more frequently in glomeroporphyritic clots or associated with plagioclase laths."
Olivine	0	2.1	0.8	1.2	1		Euhedral to subhedral	Completely replaced by saponite.


GROUNDMASS								
Plagioclase	12.7	12.7		<0.7			Euhedral to subhedral	Laths
Clinopyroxene	6.7	6.7		<0.7			Euhedral to anhedral	Occurs singly or attached to/intergrown with plagioclase.
Olivine	0	2.1		<0.7			Euhedral to subhedral	Completely replaced by saponite.
Mesostasis	52	67.5						

SECONDARY			SIZE (mm)					
MINERALOGY	PERCENT		min.	max.	av.		REPLACING / FILLING	COMMENTS
Saponite  	15						"Olivine, vesicles,  vein"	Brown to brown-gray color.
Zeolite?	3						Vein	


VESICLES/			SIZE (mm)					
CAVITIES	PERCENT	 LOCATION	min.	max.	av.		FILLING / MORPHOLOGY	COMMENTS
Vesicles	Tr	Even	0.1	1.2	0.2		Saponite	

COMMENTS : 	"Anastomosing vein net of <0.1-2 mm veins, filled with spherulitic saponite."