>I would agree completely. How big are the pebbles? How common are they?
I don't know. I have heard of white quartz pebbles which occur in coals
in NW Alabama, but I think these coals are generally considered
allochthonous anyway. Jack Pashin at the Univ of Alabama told me of a
rose quartz dropstone in a coal seam in Alabama. Jack said if the quartz
didn't come from South Carolina (about 200 miles northeast) then he
didn't know where it would have come from. I suppose the next closest
locality may be the Canadian Shield. I'll check with Jack and see if I
can get him to join us. He is a knowledgeable coal geologist and might
be willing to give his opinion of my observations (which have been
reasonably questioned by several on this list).
Thank you for your comments on secondary weathering along aquitards.
>I don't remember that aspect [macroscopic observatons of coal seams],
I'll hae to read the Schultz paper again.
Unfortunately, I don't think Schultz described his observations, he just
made the comment that they supported his chemical studies.
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