Hokkaido / Name of sample: HS-3

No.	District	Name of Pyroclastic Deposite	Age
003	Chitose, Hokkaido	Shikotsu pumice flow	30,000

Particle Size Distribution (wt%).

-0.038mm	-0.075mm	-0.15mm	-0.3mm	-0.6mm	-1.18mm	-2.36mm	-4.75mm
16.5	24.2	35.9	48.3	60.5	73.1	83.5	91.4

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Microphotograph of glass particles (size:0.15-0.3mm)	X-ray powder diffraction pattern (F: feldspar, Q: quartz)

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Chemical Compositions and Content of Volcanic Glass (wt%).

SiO2	Al2O3	Fe2O3	TiO2	CaO	MgO	Na2O	K2O	Ig.loss	Total	Content of Volcanic Glass
67.98	15.63	3.46	0.39	2.69	1.06	3.27	1.89	3.56	99.93	57.59

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XRD pattern of separated volcanic glass.	DTG pattern of separated volcanic glass.

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Chemical Compositions of Separated Vocanic Glass (wt%).

SiO2	Al2O3	Fe2O3	TiO2	CaO	MgO	Na2O	K2O	Ig.loss	Total
74.02	13.27	1.15	0.17	1.35	0.40	3.77	2.47	3.45	100.05