THIN SECTION:	"U1301B-9R-1, 11-12 cm (Piece 3)"				TS #	18	Unit:1C	"OBSERVER: RC, MS"
ROCK NAME: 	Sparsely clinopyroxene-plagioclase phyric basalt							
WHERE SAMPLED:	Pillow interior							
GRAIN SIZE:	Cryptocrystalline							
TEXTURE:	"Spherulitic, hyalo-ophitic, glomeroporphyritic, pilotaxitic, vesicular"							
PRIMARY	PERCENT 	PERCENT	SIZE (mm)			APPROX.		
MINERALOGY	PRESENT 	ORIGINAL	min.	max.	av.	COMP.	MORPHOLOGY	COMMENTS
PHENOCRYSTS								
Plagioclase	3	3	0.5	2.2	1.8		Euhedral 	Laths plus skeletal forms; solitary crystals and in glomeroporphyritic clusters with pyroxene
Clinopyroxene	1	1	0.5	1.1	"1
"		Euhedral to anhedral	Mostly in bimineralic glomeroporphyritic clots (plagioclase + pyroxene). Some occur attached to plagioclase laths.


GROUNDMASS								
Plagioclase	5	5		<0.5			Euhedral	"Laths and needles, pilotaxitic texture."
Clinopyroxene	1	1		<0.5			Euhedral to anhedral	
Olivine	1	0		<0.5			Euhedral	
Mesostasis	84	86						Sheaf-spherulitic texture. Contains opaque minerals.
SECONDARY			SIZE (mm)					
MINERALOGY	PERCENT		min.	max.	av.		REPLACING / FILLING	COMMENTS
Saponite	2						"Olivine, mesostasis, vesicles"	Fibrous/round.
Feox	1						"Olivine, vesicles"	
Pyrite	Tr						Mesostasis	

VESICLES/			SIZE (mm)					
CAVITIES	PERCENT	 LOCATION	min.	max.	av.		FILLING / MORPHOLOGY	COMMENTS
Vesicles	2	Even	0.1	0.3	0.2		"Saponite, Feox"	

COMMENTS : 	Light grey alteration patch in hand specimen consists of very fine-grained mesostasis.