> The spheroidal weathering could not be the cause, but
> Archae's claim for the Liesgang rings may be on target. If
> those were indeed the cause I think I found an answer that
> explains everything. Check out <a href=
> "[www.grahamhancock.com] post</a>of mine above.
> Unfortunately, this is one process that I know very little
> about so I cannot be overconfidect that the rings indeed stem
> from groundwater.
What is the weathering mechanism causing the concentric separations of the host rock and do you have a geologic term otherthan spheriodal weathering that describes this weathering process?
Archae Solenhofen (firstname.lastname@example.org)
> Mike B