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Stone not only comes from different holes in the earth but from 
different levels and w/ a sedimentary stone it depends on what was 
living at the time of the deposition.
If you want fossils then you specify from the fossil layer. If you don't 
want fossils then you specify from the non-fossil layers.
The layers have names, of course.

Reference: 'Prospecting Cordova Limestone in Central Texas' in 'Eight 
Stones and Many Feet' by Gabriel Orgrease wherein the goal of the 
protagonist is to locate the mysterious origin of the particularily 
fossiferous stone specified by the architect for use on the San Jacinto 
Monument resotration.

As to alternation of stones etc. there is such a thing as 
'relationships' between the designers & builders that would lend 
themselves to a depth of involvement in the design-build process. And 
architects do go visit quarries and they do talk w/ quarriers and they 
do get into selecting stone down to the individual piece at times.... 
though not always.

Limestone comes from a lot of places besides Indiana & Kentucky. You may 
also check w/ the Building Stone Institute. There are many quarriers as 
members and they do maintian a stone library.

A problem nowadays is that stone that may have been quarried from a 
certain hole at a certain level 50-100 years ago is no longer quarried. 
It is not that the stone is not there in the earth as much as that there 
is not an economy to the industry to support quarry of that particular 
stone.

][<en

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