THIN SECTION:	"U1301B-10R-1, 58-61 cm (Piece 8b)"				TS #	20	Unit:1C	"OBSERVER: RC, MS"
ROCK NAME: 	Highly olivine-clinopyroxene-plagioclase phyric basalt							
WHERE SAMPLED:	Vein							
GRAIN SIZE:	Cryptocrystalline							
TEXTURE:	"Intersertal, glomeroporphyritic."							
PRIMARY	PERCENT 	PERCENT	SIZE (mm)			APPROX.		
MINERALOGY	PRESENT 	ORIGINAL	min.	max.	av.	COMP.	MORPHOLOGY	COMMENTS
PHENOCRYSTS								
Plagioclase	10	10	0.5	3.6	1.2		Euhedral to skeletal	Occurs as laths and mono- and poly-mineralic glomeroporphyritic clots with olivine +pyroxene. 
Clinopyroxene	3	3	0.3	1	0.4		Subhedral to anhedral	Present as glomeroporphyritic clots associated with plagioclase laths.
Olivine	0	2	0.4	1.2	0.6		Euhedral to subhedral	Completely pseudomorphed  by brown saponite and Feox / hematite.

GROUNDMASS								
Plagioclase	23	23		<0.5			Euhedral	Microlaths and needles.
Clinopyroxene	7	7		<0.3			Euhedral to anhedral	Occurs singly or attached to/intergrown with plagioclase.
Olivine	0	1		<0.4			Subhedral	
Mesostasis	48	54						

			SIZE (mm)					
MINERALOGY	PERCENT		min.	max.	av.		REPLACING / FILLING	COMMENTS
Saponite	4						"Olivine, mesostasis, vein"	Brown to green color in the vesicles and olivine phenocrysts.
Celadonite	Tr						"Vesicles, veins?"	
FeO(OH)	5						"Olivine, vesicles, vein"	

VESICLES/			SIZE (mm)					
CAVITIES	PERCENT	 LOCATION	min.	max.	av.		FILLING / MORPHOLOGY	COMMENTS
Vesicles	2	Even	0.1	0.6	0.3		Saponite	



COMMENTS : 	"3 veins, (0.1-1 mm wide), filled with saponite, Feox, and celadonite(?). "