THIN SECTION:	"U1301B-7R-1, 130-132 cm (Piece 21)"				TS #	17	Unit:1C	"OBSERVER: MS, RC"
ROCK NAME: 	Moderately clinopyroxene-olivine-plagioclase phyric basalt							
WHERE SAMPLED:	Pillow interior (alteration halo)							
GRAIN SIZE:	Cryptocrystalline							
TEXTURE:	"Intersertal, spherulitic, hyalo-ophitic, glomeroporphyritic, vesicular"							
PRIMARY	PERCENT 	PERCENT	SIZE (mm)			APPROX.		
MINERALOGY	PRESENT 	ORIGINAL	min.	max.	av.	COMP.	MORPHOLOGY	COMMENTS
PHENOCRYSTS								
Plagioclase	5	7	0.4	2.4	1.6		Euhedral	Occurs as single stubby laths.
Clinopyroxene	2	2	0.3	1.2	0.8		Euhedral to anhedral	Present as glomeroporphyritic clots associated with plagioclase laths.
Olivine	0	2	0.3	1	0.5		Euhedral	Completely replaced by brown saponite and Feox.

GROUNDMASS								
Plagioclase	27	27		<0.4			Euhedral	Laths and needles.
Clinopyroxene	5	5		<0.3			Anhedral	
Olivine	0	2		<0.3			Euhedral	
Opaque	Tr						Round	In mesostasis.
Mesostasis	56	57						"Sheaf-spherulitic texture, including opaque minerals."
SECONDARY			SIZE (mm)					
MINERALOGY	PERCENT		min.	max.	av.		REPLACING / FILLING	COMMENTS
Saponite	3						"Olivine, mesostasis, veins, vesicles"	Fibrous/round.
Feox / hematite	2						"Vesicles, vein"	
Pyrite	Tr						Mesostasis	Present in the mesostasis.

VESICLES/			SIZE (mm)					
CAVITIES	PERCENT	 LOCATION	min.	max.	av.		FILLING / MORPHOLOGY	COMMENTS
Vesicles	1	Even	0.1	0.8	0.4		"Saponite, Opaque / hematite"	


COMMENTS : 	4 mm green halo (greater saponite content).