Posted by angel crespo montalvo on October 31, 19100 at 14:09:50:
In Reply to: Re: Mineral Samples posted by M. Andrews on October 27, 1998 at 11:14:31:
: Has the rock of which the monument is composed been identified yet? Obviously, for the structure to be natural the layering will have to be attributable to some natural process related to the type of rock. Is there a complete chart of the whole structure in existence yet?