THIN SECTION:	"U1301B-18R-2, 123-125 cm (Piece 2e)"				TS #	32	Unit:6	"OBSERVER: RC, MS"
ROCK NAME: 	Sparsely clinopyroxene-olivine-plagioclase phyric basalt							
WHERE SAMPLED:	Massive lava							
GRAIN SIZE:	Microcrystalline							
TEXTURE:	"Intersertal to intergranular, glomeroporphyritic"							
PRIMARY	PERCENT 	PERCENT	SIZE (mm)			APPROX.		
MINERALOGY	PRESENT 	ORIGINAL	min.	max.	av.	COMP.	MORPHOLOGY	COMMENTS
PHENOCRYSTS								
Plagioclase	3	3	1	2.7	1.5		Euhedral to skeletal	"Occurs singly, and in mono- and polymineralic glomeroporphyritic clots with olivine + clinopyroxene."
Clinopyroxene	Tr	Tr	0.5	0.8	0.7		Subhedral to anhedral	Present as glomeroporphyritic clots associated with plagioclase laths.
Olivine	0	1	0.7	1.1	0.9		Euhedral to subhedral	Completely pseudomorphed  by brown or green saponite + Feox.

GROUNDMASS								
Plagioclase	50	50		<1			Euhedral to subhedral	Present as microlaths and needles.
Clinopyroxene	20	20		<0.5			Anhedral	Occurs singly or attached to/intergrown with plagioclase.
Olivine	0	14		<0.7			Euhedral to subhedral	
Mesostasis	10	10						
SECONDARY			SIZE (mm)					
MINERALOGY	PERCENT		min.	max.	av.		REPLACING / FILLING	COMMENTS
Saponite	8						"Olivine, mesostasis, vein, vesicles"	Brown in color in the vesicles and olivine phenocrysts.
Celadonite	3						Vesicles	
Feox	4						"Vesicles, mesostasis"	


VESICLES/			SIZE (mm)					
CAVITIES	PERCENT	 LOCATION	min.	max.	av.		FILLING / MORPHOLOGY	COMMENTS
Vesicles	2	Even	0.3	1	0.7		"Saponite, Feox"	


COMMENTS : 	"Grain size changes across the thin section, but abundances of phenocrysts do not change (near the chilled margin)."