FOR SOME REASON UNKNOWN TO ME MOST VOLCANOES DO NOT PRODUCE OBSIDIAN AT LEAST NOT IN QUALITY OR LARGE ENOUGH SIZE FOR USE IN MAKEING POINTS. IN HAWAII AS CLOSE TO OBSIDIAN AS IT GETS IS SOMETHING CALLED PELIES HAIR WHICH IS VOLCANIC GLASS HAIR THIN.
SOME VOLCANOES HAVE VOLCANIC GLASS WITH OTHER MINERALS INSIDE THAT PREVENT IT FROM BEING FLAKED TO MAKE GOOD LARGE POINTS (SEE SNOWFLAKE OBSIDIAN). VOLCANOES PRODUCE ASH, BASALT AND VARIOUS SORTS OF LAVA BUT GOOD OBSIDIAN IS RARE AND NOT FOUND IN THE MAJORITY OF VOLCANIC MATERIAL WORLD WIDE.
I AM NOT SURE BUT THE LARGEST DEPOSITS AND THE MOST VARIETYS OF OBSIDIAN ARE FOUND IN THE AMERICAS ESPECIALLY SOUTH AMERICA AND TO THE WEST IN NORTH AMERICA.
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