THIN SECTION:	"U1301B-30R-1, 113-115 cm"				TS #	47	Unit:7C	"OBSERVER: MS, RC"
ROCK NAME: 	Sparsely clinopyroxene-plagioclase phyric basalt							
WHERE SAMPLED:	Vein							
GRAIN SIZE:	Crypto to microcrystalline							
TEXTURE:	"Intersertal, glomeroporphyritic pilotaxitic"							
PRIMARY	PERCENT 	PERCENT	SIZE (mm)			APPROX.		
MINERALOGY	PRESENT 	ORIGINAL	min.	max.	av.	COMP.	MORPHOLOGY	COMMENTS
PHENOCRYSTS								
Plagioclase	2	2	0.3	1.5	1.2		Euhedral to skeletal	"Occurs as laths, and in mono- and bi-mineralic glomeroporphyritic clots with pyroxene. "
Clinopyroxene	2	2	0.3	0.5	0.4		Subhedral to anhedral	Present as glomeroporphyritic clots associated with plagioclase laths.


GROUNDMASS								
Plagioclase	20	20		<0.5			Euhedral	Microlaths and needles.
Clinopyroxene	7	8		<0.3			Euhedral to anhedral	Occurs singly or attached to/intergrown with plagioclase.
Olivine	0	5		<0.5			Subhedral	
Mesostasis	57	58						

SECONDARY			SIZE (mm)					
MINERALOGY	PERCENT		min.	max.	av.		REPLACING / FILLING	COMMENTS
Saponite	5						"Olivine, mesostasis, vein"	
Celadonite	2						Vesicles	
FeO(OH) 	3						"Olivine, mesostasis, vesicles, vein"	


VESICLES/			SIZE (mm)					
CAVITIES	PERCENT	 LOCATION	min.	max.	av.		FILLING / MORPHOLOGY	COMMENTS
Vesicles	5	Even	0.1	0.5	0.3		Saponite	

COMMENTS : 	"0.1Ð <0.05 mm, branching veins. Halos die out along these microveins, and the vein fill changes in the portion of the vein with no halo: vesicle filling/olivine replacing minerals reflect this."