In a message dated 6/11/2000 6:46:15 PM Eastern Daylight Time,
[log in to unmask] writes:
> The progressive surficial delamination of argillaceous sedimentary dimension
> stone is attributable to the cumulative combined physicochemical effect of
> cyclic hydration, differential thermal expansion and ion exchange in the
> clay minerals.
I think I at least understand the words "clay" and "woodpecker" .... but then
maybe not.
M