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Re: arcillite (sic)
On Sat, 24 Oct 1998, Write Huntley wrote:
> All this discussion prompted me to see what "arcillite" really is,
> Guess what? I can't find it! The closest I can find is a material
> similar to laterite called argillite. It is a silica, alumina,
> iron-bearing material produced by long eons of weathering, just about
> like laterite. Maybe containing more silica, the biggest difference I
> see is that laterite does not claim a high CEC. Argillite usually does
> contain considerable iron.
"argillite" is a little used and fairly generic rock name. It describes
a clay-rich rock. The related descriptive term "argillaceous" - meaning
clay-rich - is in more common use.
I think "arcillite" is a trade name and may be trademarked. Arcillite
may or may not be an argillite and it may or may not be argillaceous.