THIN SECTION:	"U1301B-21R-3, 121-123 cm (Piece 17)"				TS #	38	Unit:7B	"OBSERVER: Rc, MS"
ROCK NAME: 	Highly olivine-clinopyroxene-plagioclase phyric basalt							
WHERE SAMPLED:	Pillow rim							
GRAIN SIZE:	Cryptocrystalline							
TEXTURE:	"Spherulitic, hyalo-ophitic, glomeroporphyritic, vesicular"							
PRIMARY	PERCENT 	PERCENT	SIZE (mm)			APPROX.		
MINERALOGY	PRESENT 	ORIGINAL	min.	max.	av.	COMP.	MORPHOLOGY	COMMENTS
PHENOCRYSTS								
Plagioclase	10	10	0.2	4.5	1.2		Euhedral	"Laths and stubby crystals, and mono- and poly-mineralic glomeroporphyritic clots. Pale green or brown glass inclusions in the core"
Clinopyroxene	3	3	0.2	0.5	0.8		Euhedral to anhedral	"Occurs singly, but more frequently in glomeroporphyritic clots or associated with plagioclase laths."
Olivine	0	2	0.2	0.5	1		Euhedral to subhedral	Completely replaced by saponite.

GROUNDMASS								
Plagioclase	10	10		<0.2			Euhedral to subhedral	Microlaths.
Clinopyroxene	5	5		<0.2			Euhedral to anhedral	Occurs singly or attached to/intergrown with plagioclase.
Olivine	0	4		<0.2			Euhedral to subhedral	Completely replaced by saponite.
Mesostasis	63	64						

SECONDARY			SIZE (mm)					
MINERALOGY	PERCENT		min.	max.	av.		REPLACING / FILLING	COMMENTS
Saponite  	4						"Olivine, vesicles,  vein"	Brown to green in color.
Feox + iddingsite	1						"Olivine, vesicles,  vein"	


VESICLES/			SIZE (mm)					
CAVITIES	PERCENT	 LOCATION	min.	max.	av.		FILLING / MORPHOLOGY	COMMENTS
Vesicles	2	Even	0.2	1	0.5		"Saponite, Feox"	

COMMENTS : 	"Microvein runs through halo <0.1 mm, filled with saponite (green or brown)."