Stones, where did they come from?
Posted on July 5, 2012 by Administrator
Maybe you have read that the sediment that formed these sharpening stones mined for 800 years in
the outskirts of Kyoto was spewed as dust from a volcano. I have not, nor do I have the means to
prove for sure that the particles were spewed into the open during a Pilinian event as airborne dust,
or as some have said they were dispensed as floating dust particles ejected from an underwater
volanic vent. In anycase the fact that the heavier and larger particles settled first or closest to the
source is logical and that the smaller finer particles settled last or farthest away. It has been stated
that the layering of these sediments took a very long time to accomplish, somewhere in the 1mm per
1,000 year range.
The fineness and hardness of the stone are in principle independent factors. The fineness of the grit
particles was was the result of an atomisation volcanic event that took place 225,000,000 years ago.
The actual hardness of the stone is the result metamorphic compaction, an ongoing process that
evolved slowly for these stones over the past 225,000,000 years, and which ended the day the stone
was removed from the ground. If you can take these statements as facts, a good many questions you
might have along the way can be answered using geological logic.
I am a theorist, not a trained scientist in any specific field like geology, and my gut feeling or
speculation tells me that the particles were released into the air in an event similar to the Pompeii
Herculaneum Mount Vesuvius incident (an excellent explanation here), where millions, if not tens of
millions of tons, an enormous amount of material was released into the atmosphere over relatively
short period of time, maybe even just a few weeks or months, but not eons. And that during that
period of, lets just say two weeks, the ash deposits were carried up into the atmosphere and away
laterally by the prevailing winds from the source (the cone of the volcano), and that then these ash
particles were deposited at various distances as falling ash in a direct ratio and wholly dependent
opon their specific gravity. Layer upon layer alighted upon pools of realitively shallow water and
settled in an orderly manner, sometimes traping or including radiolariums, some layers having
chemical components that would react to form miniature gas bubbles, some not. Some layers were
more variegated as in these examples,
I am speculating that at intervals determined by the activity of the volcano, massive waves of larger
unrelated alternate material in particle form and size was thrown farther up or enough towards those
pools that they settled upon each of the previous deposits and that this new material sealed or acted
as a cap or shield to seal off each layer respectively thereby retaining the purity of the earlier
sediment composition from contaminates. We know this particle type in its current form as kawa, a
kind of skin found between the layers of awasedo sharpening stone in the mines of Kyoto.
The kawa on each stone is like its fingerprint with unique characteristics of color and chemical
composition and the kawa from each mine in the Yamashirio area of Kyoto is like a variety of tree bark
growing in a different location with a different genus. In my open air dispersal senerio those same
winds goverened by the specific gravity and wind speed acted on the kawa particle material (much of
it iron) in exactly the same was as it did with the purer silica material in its dispersal at different
distances along the path leading away from the volcano; not randomly but in a understandable and
logical manner. It is not difficult to believe that a strong prevailing wind could remain stable in a
particular directions over a period of time long enough to deposit large amounts of material.
As the next 200 million years unfolded other events would have profound effects on the layers, but
the original deposits in my model through airborne dispersal of the sharpening medium and the skin
or waste particles could be workable.
The commonly held alternate dispersal and layering senerio is that all this activity occured as the
result of an underwater event with the source being a volcanic vent, and further suggests that water
currents not air distributed the particles along the path away from the source as they sunk to the
bottom as heavier or lighter paritcles.
In either case I hope that this short description will open up some conversations on the subject.