THIN SECTION:	"U1301B-14R-1, 90-92 cm (Piece 11)"				TS #	25	Unit:2B	"OBSERVER: MS, RC"
ROCK NAME: 	Moderately olivine-clinopyroxene-plagioclase phyric basalt							
WHERE SAMPLED:	Flow interior							
GRAIN SIZE:	Microcrystalline							
TEXTURE:	"Intersertal to intergranular, glomeroporphyritic, vesicular"							
PRIMARY	PERCENT 	PERCENT	SIZE (mm)			APPROX.		
MINERALOGY	PRESENT 	ORIGINAL	min.	max.	av.	COMP.	MORPHOLOGY	COMMENTS
PHENOCRYSTS								
Plagioclase	5	5	0.7	2	1.6		Euhedral	Occurs as single crystals/stubby laths.
Clinopyroxene	1	1	0.9	1.6	1.4		Euhedral to anhedral	Present as glomeroporphyritic clots associated with plagioclase laths.
Olivine	0	Tr	0.3	0.8	0.5		Euhedral	Completely replaced by brown saponite and Feox.

GROUNDMASS								
Plagioclase	30	30		<0.4			Euhedral	Laths and needles.
Clinopyroxene	32	32		<0.3			Anhedral	
Olivine	0	12		<0.3			Euhedral	
Opaque	Tr						Round	In mesostasis.
Mesostasis	20	20						"Sheaf-spherulitic texture, with opaque minerals."
SECONDARY			SIZE (mm)					
MINERALOGY	PERCENT		min.	max.	av.		REPLACING / FILLING	COMMENTS
Saponite + celadonito?	11						"Olivine, mesostasis, vesicles"	"Fibrous/round, brown to green saponite.."
Feox / hematite	Tr						"Vesicles, mesostasis"	
Pyrite	Tr						Mesostasis	Present in the mesostasis.

VESICLES/			SIZE (mm)					
CAVITIES	PERCENT	 LOCATION	min.	max.	av.		FILLING / MORPHOLOGY	COMMENTS
Vesicles	5	Even	0.5	1.7	1		"Saponite, opaque minerals"	



COMMENTS : 	"Disseminated micro-pyrite vein (pyrite front, bounding halo portion of slide) green clay restricted to halo area."