THIN SECTION:	"U1301B-1R-1, 118-121 cm (Piece 15)"				TS #	2	Unit:1B	"OBSERVER: RC, MS"
ROCK NAME: 	Sparsely 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	3	3	0.4	1.4	0.8		Euhedral to subhedral	"Normally stubby laths, and in glomeroporhyritic clots."
Clinopyroxene	1	1	0.2	0.5	0.4		Anhedral; round	Predominantly in glomeroporphyritic clots or associated with plagioclase laths.
Olivine	0	Tr	0.2	0.5	0.3		Euhedral to subhedral	Completely replaced by saponite + Feox.


GROUNDMASS								
Plagioclase	38	38		<0.7			Euhedral	Laths and needles.
Clinopyroxene	20	20		<0.5			Euhedral to anhedral	Occurs singly or attached to/intergrown with plagioclase.
Olivine	0	Tr		<0.3			Subhedral	Completely replaced by clay + Feox.
Mesostasis	23	38						
Opaque	Tr							
SECONDARY			SIZE (mm)					
MINERALOGY	PERCENT		min.	max.	av.		REPLACING / FILLING	COMMENTS
Saponite	15						"Olivine, mesostasis"	Brown to green color in the vesicles and olivine.
"Hematite, Feox"							"Vein fill, vesicles and olivine"	


VESICLES/			SIZE (mm)					
CAVITIES	PERCENT	 LOCATION	min.	max.	av.		FILLING / MORPHOLOGY	COMMENTS
Vesicles	Tr	Even	0.2	0.3	0.25		"Saponite, Feox"	



COMMENTS : 	"An ~2 mm vein is filled with hematite, iddingsite, and saponite. "