Here is a link to the slides from Dr. Jana’s seminar presentation at the International Cement Microscopy Association conference in Quebec City from May of 2007 (6.9mb PDF file):

[www.cmc-concrete.com]

It shows a number of interesting EDS, XRD, etc. results, with SEM micrographs from both the Lauer sample and a piece of casing stone from the British Museum, as well as Tura limestone. Little difference is observed between specimens of bulk uncontaminated limestone other than what would be expected under typical geologic variation within a large sedimentary deposit.

Archae Solenhofen (solenhofen@hotmail.com)