Posted on July 5, 2012 by Administrator I am a theorist, not a trained geolog ist . My intuition tells me that the particles making up the sharpening stones called Awasedo were composed during an extension of short but intense volcanic eruptions of tephra. During this time, millions if not tens of millions of tons of material were released into the air only to settle and cool in pools of fresh water in and around the area where we now call Lake Biwa. And during that p