THIN SECTION:	"U1301B-2R-1, 56-58 cm (Piece 11a)"				TS #	4	Unit:1C	"OBSERVER: RC, MS"
ROCK NAME: 	Highly olivine-clinopyroxene-plagioclase phryric basalt							
WHERE SAMPLED:	Chilled contact							
GRAIN SIZE:	Cryptocrystalline							
TEXTURE:	"Hyalo-ophytic, spherulitic, gromeroporphyritic.  "							
PRIMARY	PERCENT 	PERCENT	SIZE (mm)			APPROX.		
MINERALOGY	PRESENT 	ORIGINAL	min.	max.	av.	COMP.	MORPHOLOGY	COMMENTS
PHENOCRYSTS								
Plagioclase	15	15	0.4	2	1.2		Euhedral to skeletal	Occurs singly and in bimineralic glomeroporphyritic clots with olvine.
Clinopyroxene	2	2	0.2	0.6	0.4		Anhedral; round	Normally in glomeroporphyritic clots or associated with plagioclase laths.
Olivine	0	5	0.2	0.8	0.6		Euhedral to subhedral	Completely replaced by green and pale brown saponite + opaques / FeO(OH).

GROUNDMASS								
Plagioclase	2	2		<0.4			Euhedral	Microlaths and needles.
Clinopyroxene	1	1		<0.2			Euhedral to anhedral	Occurs singly or attached to /intergrown with plagioclase.
Olivine	0	1		<0.2			Subhedral	Completely replaced by clay + opaque.
Mesostasis	67	64						Sheaf-spherulitic texture including small opaque minerals.
Glass	7	12						Fresh to altered glass.
SECONDARY			SIZE (mm)					
MINERALOGY	PERCENT		min.	max.	av.		REPLACING / FILLING	COMMENTS
Saponite	7						"Olivine, mesostasis, vein"	Brown to green color in the vesicles and the olivine phenocrysts.
Zeolite?	Tr						Vesicles	
Opaque/FeO(OH)	3						Vesicles	

VESICLES/			SIZE (mm)					
CAVITIES	PERCENT	 LOCATION	min.	max.	av.		FILLING / MORPHOLOGY	COMMENTS
Vesicles	2	Even	0.1	1.2	0.5		"Saponite, FeO(OH), celadonite"	



COMMENTS : 	Veins are filled by fiberous saponite + FeO(OH).