I read news about the dig on a forum and the diggers say they found many irregularities in extracted tubes.
8,2 meters deep they found a layer of brown clay,at 8,5m they found a layer of concrete stone wall...they found same stuff in 2 different holes. At
9,9m to 10,2m depth there is a layer of decorative stones with added iron
At another dig they found lapor, organic material and sant at 13,3m, at 14,2m again decorative stones
this is apparently one of those decorative stones (floor) :
He returned to Houston with a sample of these stones on 18.07.2005 and went to university of Houston, Department of Geoscience, for analysis...ran by
Dr. Reid. He couldnt say what the material is at first glance and hes an expert apparently in the field. So he spent additiona time examining it and
said its hard to say, becouse the material is made out of some very "fine" stuff.