Re: ][<en Follett's, "Is there iron in limestone?"

When working on St. Thomas Church Fifth Avenue, I encountered several
seams,"veins" or "inclusions" (or is that "mal-occlusions"?) which appeared
as shallow weathered grooves across an otherwise intact piece of sculpted
limestone from which oozed the tell-tale brown-orange stain of iron from
within.  Not a split in the stone, not a joint,  not a buried anchor, but
simply a spot where iron trapped within disolved and made it to the
surface.  Sometimes I've seen the iron as a "pimple" on the surface of the
stone.  In this case, nothing to worry about, just a disfigurment which by
luck didn't appear on some Apostle's face.  --Jim