THIN SECTION:	"U1301B-25R-1, 114-117 cm (Piece 17)"				TS #	42	Unit:7B	"OBSERVER: RC, MS"
ROCK NAME: 	Moderately olivine-clinopyroxene-plagioclase phyric basalt							
WHERE SAMPLED:	Pillow interior							
GRAIN SIZE:	Cryptocrystalline							
TEXTURE:	"Intersertal, spherulitic, glomeroporphyritic, vesicular"							
PRIMARY	PERCENT 	PERCENT	SIZE (mm)			APPROX.		
MINERALOGY	PRESENT 	ORIGINAL	min.	max.	av.	COMP.	MORPHOLOGY	COMMENTS
PHENOCRYSTS								
Plagioclase	3	3	0.3	5	1.2		Euhedral to skeletal	"Occurs singly, and in mono- and poly-mineralic glomeroporphyritic clots with olivine + clinopyroxene."
Clinopyroxene	2	2	0.3	3	0.4		Subhedral to anhedral	Present as glomeroporphyritic clots associated with plagioclase laths.
Olivine	0	Tr	0.3	1.1	0.6		Euhedral to subhedral	Completely pseudomorphed  by pale brown to brown saponite.

GROUNDMASS								
Plagioclase	15	15		<0.3			Euhedral	Microlaths and needles.
Clinopyroxene	10	10		<0.3			Euhedral to anhedral	Occurs singly or attached to/intergrown with plagioclase.
Olivine	0	5		<0.3			Subhedral	
Mesostasis	67	73						
Opaque minerals	2	2						
SECONDARY			SIZE (mm)					
MINERALOGY	PERCENT		min.	max.	av.		REPLACING / FILLING	COMMENTS
Saponite	6						"Olivine, mesostasis, vein"	Brown saponite in the vesicles and olivine.
Celadonite	1							
Feox	3							
Pyrite	Tr						Vein	Present in the mesostasis.

VESICLES/			SIZE (mm)					
CAVITIES	PERCENT	 LOCATION	min.	max.	av.		FILLING / MORPHOLOGY	COMMENTS
Vesicles	Tr	Even	0.3	1.3	0.7		Saponite	


COMMENTS :