THIN SECTION:	"U1301B-14R-1, 24-26 cm (Piece 4)"				TS #	24	Unit:2B	"OBSERVER: RC, MS"
ROCK NAME: 	Moderately olivine-clinopyroxene-plagioclase phyric basalt							
WHERE SAMPLED:	Massive flow							
GRAIN SIZE:	Cryptocrystalline							
TEXTURE:	"Spherulitic, hyalo-ophitic, vesicular"							
PRIMARY	PERCENT 	PERCENT	SIZE (mm)			APPROX.		
MINERALOGY	PRESENT 	ORIGINAL	min.	max.	av.	COMP.	MORPHOLOGY	COMMENTS
PHENOCRYSTS								
Plagioclase	4	4	0.5	2	1.2		Euhedral; stubby/laths	"Occurs singly, but is more common in monomineralic, bimineralic, and polymineralic glomeroporphyritic clots with pyroxene. Contains glass inclusions."
Clinopyroxene	2	2	0.3	0.8	0.5		Subhedral	Present as glomeroporphyritic clots associated with plagioclase laths.
Olivine	0	1	0.3	1.2	0.7		Euhedral	Completely replaced by brown saponite.

GROUNDMASS								
Plagioclase	2	2		<0.5			Euhedral	Laths and needles.
Clinopyroxene	1	1		<0.3			Anhedral	
Olivine	0	1		<0.3			Euhedral	
Mesostasis	86	87						"Sheaf-spherulitic texture, contains opaque minerals."
SECONDARY			SIZE (mm)					
MINERALOGY	PERCENT		min.	max.	av.		REPLACING / FILLING	COMMENTS
Saponite	2						"Olivine, mesostasis, vesicles"	Fibrous/round.
Iddingsite	1						"Vesicles, olivine"	
Pyrite	Tr						"Mesostasis, vesicles"	Present in the mesostasis and vesicles.

VESICLES/			SIZE (mm)					
CAVITIES	PERCENT	 LOCATION	min.	max.	av.		FILLING / MORPHOLOGY	COMMENTS
Vesicles	2	Even	0.1	1.5	0.8		"Saponite, pyrite"	



COMMENTS : 	Feox restricted to the 4 mm mixed halo - empty vesicles / saponite lined vesicles in the adjacent part of the thin section.