THIN SECTION:	"U1301B-6R-1, 50-52 cm (Piece 8b)"				TS #	12	Unit:1C	"OBSERVER: RC, MS"
ROCK NAME: 	Moderately clinopyroxene-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	5	5	0.1	1	0.5		Euhedral; lath and stabby	"Occurs singly, but is more common in monomineralic and bimineralic glomeroporphyritic clots with pyroxene. Contains glass inclusions."
Clinopyroxene	2	2	0.1	0.5	0.3		Euhedral to anhedral	Present as glomeroporphyritic clots associated with plagioclase laths.


GROUNDMASS								
Plagioclase	2	2		<0.1			Euhedral	Laths and needles.
Clinopyroxene	2	2		<0.1			Euhedral to anhedral	
Olivine	0	1		<0.1			Euhedral	
Mesostasis	38	38						"Sheaf-spherulitic texture, including opaque minerals."
Glass	47	48						"Fresh, transparent, pale brown. Contains rare spherulites, grades to the variolitic zone."
SECONDARY			SIZE (mm)					
MINERALOGY	PERCENT		min.	max.	av.		REPLACING / FILLING	COMMENTS
Saponite	2						"Olivine, mesostasis, vein, vesicles"	Fibrous/ round in shape.
Zeolite	Tr						"Vesicles, veins"	
Pyrite	Tr						Mesostasis	Present in the glass.

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



COMMENTS : 	Veins consist of saponite and zeolite. 0.05-0.5 mm microcracks through altered glass.