THIN SECTION:	"U1301B-4R-3, 138-140 cm (Piece 13)"				TS #	8	Unit:1C	"OBSERVER: RC, MS"
ROCK NAME: 	Sparsely plagioclase phyric basalt							
WHERE SAMPLED:	Chilled contact							
GRAIN SIZE:	Cryptocrystalline							
TEXTURE:	"Glassy, spherulitic, hyalo-ophitic, glomeroporphyritic, vesicular"							
PRIMARY	PERCENT 	PERCENT	SIZE (mm)			APPROX.		
MINERALOGY	PRESENT 	ORIGINAL	min.	max.	av.	COMP.	MORPHOLOGY	COMMENTS
PHENOCRYSTS								
Plagioclase	3.5	3.5	0.3	3	1.8		Euhedral to skeletal	"Occurs singly, but is more common in monomineralic clots."



GROUNDMASS								
Plagioclase	8.2	8.2		<0.3			Euhedral	Laths and needles.
Clinopyroxene	2.9	2.9		<0.3			Euhedral to anhedral	
Olivine	0	5.2		<0.3			Subhedral	
Mesostasis	48	51.5						Including opaque minerals.
Glass	15	17.4						"Fresh, transparent, pale brown. Contains rare spherulites, grades to the variolitic zone."
SECONDARY			SIZE (mm)					
MINERALOGY	PERCENT		min.	max.	av.		REPLACING / FILLING	COMMENTS
Saponite	8.2						"Olivine, mesostasis, vein, vesicles"	Fibrous/round in shape.
FeO(OH)	1						"Olivine, vesicles"	
Pyrite	Tr						Mesostasis and glass	
Zeolite	2.9							

VESICLES/			SIZE (mm)					
CAVITIES	PERCENT	 LOCATION	min.	max.	av.		FILLING / MORPHOLOGY	COMMENTS
Vesicles	1.4	Even	0.1	1	0.7		"Saponite, Feox"	



COMMENTS :