Dear Joan:
This is a bit too much for me to give you even a wild guess, let alone an educated one. Only a physical inspection of the installation could determine what the real story is and if and how it should be addressed.
One thing is for sure: Tropic Brown may have a few fissures, but they are all small. Second, no fissure is as straight as an arrow and 22” long to boot!
Something is obviously wrong and probably serious, but I can intelligently tell you what and, consequently, what course of action to take.
May I ask you now to please read and e-sign our Statement of Purpose at:
http://www.marblecleaning.org/purpose.htm?
Ciao and good luck,
Mauri
Article ID: 1188
Created On: Tue, Feb 12, 2008 at 1:36 PM
Last Updated On: Tue, Feb 12, 2008 at 12:00 AM
Authored by: Maurizio Bertoli [mail@mbstone.com]
Online URL: https://marblecleaning.org/knowledgebase/article.php?id=1188