"169-1038G-15X-CC, Piece 1 (0-3 cm)"
Thin section: # 82
"ROCK NAME: Microcrystalline, moderately plagioclase-, sparsely olivine-phyric basalt"
GRAIN SIZE: Microcrystalline to glassy.
TEXTURE:  Variolitic to intersertal; porphyritic.
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"PRIMARY		PERCENT 	PERCENT	SIZE		"
"MINERALOGY		PRESENT	ORIGINAL	(mm)	MORPHOLOGY	COMMENTS"

PHENOCRYSTS
"Plagioclase		5	5		0.5-1.5	Acicular to prismatic	Generally fresh. Composition: An54."
"Olivine			0.25	<1		1	Prismatic.			Partly altered to talc."
GROUNDMASS
"Plagioclase		20	20		0.1	Acicular."
"Magnetite			5	5		0.01-0.1	Granular."
Mesostasis
"(cryptocrystalline)		40									"
"(glassy)			30							Altered? to brown clay(?)"


"SECONDARY			REPLACING/"
"MINERALOGY		PERCENT	FILLING					COMMENTS"
"Talc			<1	After olivine	0.001				Very fine-grained, ragged, and interwoven.		"
"Smectite			Trace	Crosscuts	0.001				Fills 0.1 mm wide vein crosscutting rock."

"VESICLES/			SIZE	"
"CAVITIES		PERCENT	(mm)		FILLING		SHAPE		COMMENTS"
"Vesicles		1		1.5		Open.		Rounded."

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COMMENTS:


"169-1038G-16X-1, Piece 1 (0 -5 cm)"
Thin section: # 83
"ROCK NAME: Plagioclase, clinopyroxene, olivine basalt"
GRAIN SIZE: Fine- to medium-grained (aphyric).
"TEXTURE: Subophitic, intersertal."
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"PRIMARY		PERCENT 	PERCENT	SIZE		"
"MINERALOGY		PRESENT	ORIGINAL	(mm)	MORPHOLOGY	COMMENTS"

GROUNDMASS
"Plagioclase		49	50		0.1-5 	Acicular laths.		Relatively fresh, some have a minor dusting of clay"
"										along rims and some cleavages and fractures."
"										Composition: An55-An60."
"Clinopyroxene		20	20		0.1 to 2.5	Stubby subhedral 	Relatively fresh."
"							to euhedral, some"
"							elongate."
"Magnetite			Trace	Trace		0.01	Anhedral, ragged.	Interstitial to plagioclase and clinopyroxene, at"
"										clinopyroxene grain boundaries, and as inclusions in"
"										clinopyroxene (rare)."
"mesostasis		0	30		0.001				Very fine-grained, interstitial to plagioclase and"
"										clinopyroxene."

"SECONDARY			REPLACING/"
"MINERALOGY		PERCENT	FILLING					COMMENTS"
"Chlorite/smectite		30	Mesostasis	0.001				Very fine-grained, intersitital to plagioclase and"
"										clinopyroxene."
"Chalcopyrite		Trace.	Mesostasis	0.02	Anhedral.			Ragged blebs in mesostasis.	"

"VESICLES/			SIZE"
"CAVITIES		PERCENT	(mm)		FILLING		SHAPE		COMMENTS"
None
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COMMENTS: Phenocrysts are relatively unaltered; mesostasis is completely altered to chlorite/smectite.