THIN SECTION:	"U1301B-36R-1, 29-32 cm (Piece 4)"				TS #	53	Unit:8C	"OBSERVER: MS, RC"
ROCK NAME: 	Moderately clinopyroxene-plagioclase phyric basalt							
WHERE SAMPLED:	Vein							
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	3	3	0.2	2	1.2		Euhedral	"Laths and stubby crystals, and in mono- and bi-mineralic gromeloporphyritic clots.  "
Clinopyroxene	2	2	0.2	0.8	0.4		Euhedral to subhedral	"Occurs singly, but more frequently in glomeroporphyritic clots or associated with plagioclase laths."


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	73	74						

SECONDARY			SIZE (mm)					
MINERALOGY	PERCENT		min.	max.	av.		REPLACING / FILLING	COMMENTS
Saponite  	5						"Olivine, vesicles,  vein"	Brown to green in color.
Feox	Tr						"Olivine, vesicles,  vein"	


VESICLES/			SIZE (mm)					
CAVITIES	PERCENT	 LOCATION	min.	max.	av.		FILLING / MORPHOLOGY	COMMENTS
Vesicles	2	Even	0.1	0.5	0.4		"Saponite, Feox"	



COMMENTS : 	"0.1-2 mm-wide veins, with branching 'off-shoots'. Walls of the thicker veins are lined with pale brown granular clay (saponite?), the center of veins are not preserved in the thin section. Narrower veins are filled with granular saponite, and decrease in width across the thin section."