THIN SECTION:	"U1301B-2R-1, 4-8 cm (Piece 2)"				TS #	3	Unit:1C	"OBSERVER: MS, RC"
ROCK NAME: 	Sparsely olivine-clinopyroxene-plagioclase phyric basalt							
WHERE SAMPLED:	Pillow interior (alteration halo)							
GRAIN SIZE:	Cryptocrystalline							
TEXTURE:	"Intersertal, glomeroporphyritic."							
PRIMARY	PERCENT 	PERCENT	SIZE (mm)			APPROX.		
MINERALOGY	PRESENT 	ORIGINAL	min.	max.	av.	COMP.	MORPHOLOGY	COMMENTS
PHENOCRYSTS								
Plagioclase	2.2	2.2	1.2	2	1.5		Euhedral to subhedral	"Occurs singly, but is more common in monomineralic glomeroporphyritic clots."
Clinopyroxene	1.2	1.2	1.5	2.5	1.3		Anhedral; round	Normally in glomeroporphyritic clots or associated with plagioclase laths.
Olivine	0	Tr	1	1	0.6		Euhedral to subhedral	Completely replaced by green saponite + iddingsite.

GROUNDMASS								
Plagioclase	14.2	14.2		<0.8			Euhedral	Laths and needles.
Clinopyroxene	3.2	3.2		<0.8			Euhedral to anhedral	Occurs singly or attached to/intergrown with plagioclase.
Olivine	0	2		<0.8			Subhedral	Completely replaced by clay + Feox.
Mesostasis	67	74.9						

SECONDARY			SIZE (mm)					
MINERALOGY	PERCENT		min.	max.	av.		REPLACING / FILLING	COMMENTS
Saponite	5						"Olivine, mesostasis, vein"	Brown to green color in the vesicles and replacing olivine.
Celadonite	2						Vesicles	Present in the vesicle centers.
Zeolite?	Tr						Vesicles	Present in the vesicle centers.
Opaque / FeO(OH)	3						Vesicles	Present in the vesicle centers.

VESICLES/			SIZE (mm)					
CAVITIES	PERCENT	 LOCATION	min.	max.	av.		FILLING / MORPHOLOGY	COMMENTS
Vesicles	3.1	Even	0.1	1.2	0.5		"Saponite, Feox, celadonite"	



COMMENTS : 	"Saponite, celadonite, and opaques / Feox often occur in the vesicles of the black halo. Secondary mineral assemblage sequences in the vesicles are Celadonite+Opaque (hematite or geothite)+saponite. "