The Geological Proof, part 1.

Jumbled fossil shells in a limestone block of the Great Pyramid. Natural sedimentation at sea bottom normally leaves them in horizontal layers.
In prehistoric times most of present-day Egypt was submerged under the sea. The decomposing remains of marine organisms, shells and skeletons, plants, seaweed and algae, fallen to the bottom of the sea, formed mud that condensed itself into a sedimentary rock we call limestone.
A natural process that lasted thousands of years consolidated and hardened them, forming banks of limestone. The pyramid blocks are made of this limestone, a sedimentary rock formed from skeletons and large fossil shells of marine organisms. These fossil remains are normally found in sedimentary horizontal layers. Yet, in the stones of the Great Pyramid, Professor Davidovits found them in disarray, jumbled up together quite haphazardly as if they were artificially mixed with some kind of pestle.
Another phenomenon observed in the pyramid stones was the presence of air bubbles, organic fibers, bones and animal teeth, foreign materials never found in natural limestone – which would seem to be further proof that the stones were man-made.
Fossil shells
The numilitic limestone (the jumbled fossil shells in pyramid stone)
Mr. XX.. does not specify why he thinks that intact fossil shells in the pyramid blocks prove that they are not concrete. If Mr. XX.. had even the most fundamental knowledge of the cast-stone theory, he would know that the fossil shell rubble of the Giza quarries provided the aggregates for the pyramid blocks.
I hope that Mr. XX.. is not merely repeating Dr. Mark Lehner’s ill-considered critique of the cast-stone theory. In 1988, Dr. Lehner used this very same argument to convince NOVA that the cast-stone theory is bunkum. Even as late as the filming of “This Old Pyramid,” when Lehner and his colleagues on the NOVA staff were busily trying to discredit Davidovits and the cast-stone theory, they still did not understand the basis of the theory. This is a sad affront to science. Their lack of knowledge is demonstrated by the fact that when Dr. Davidovits went to the Giza quarry to examine the limestone, he was driven to the spot by one of Lehner’s assistants (whose name is unknown to me). Dr. Davidovits told me that this assistant turned to him as they were driving along and said, “We know you are wrong.” Dr. Davidovits replied by saying something like, “Oh really? I have researched and studied for over 20 years and you know I am wrong. How is that?” The assistant said, “Because there are fossil shells in the pyramid blocks, just as there are fossil shells in the quarries.” Dr. Davidovits replied by saying something like, “Well, where do you think the aggregates for the pyramid-concrete-blocks came from, the Moon? No, the shells came from the quarries.” The assistant’s eyes opened wide and he said nothing.
The fossil shells would remain intact for the most part but would be jumbled in pyramids blocks. Why would the pyramid builders make more work for themselves by crushing them? As I stated, “When he participated in the filming of NOVA’s “This Old Pyramid”, Dr. Davidovits showed how easily wet Giza bedrock comes apart and releases clay within 24 hours. Sadly, his 10-minute demonstration showing how to make geopolymeric pyramid blocks with Giza limestone was cut from the film in the 1997 edited version.” In other words, the quarry material is rather loosely bound by clay. The clay releases in water so that the shells are no longer bound. Once the shells are loosened, they can be gathered as aggregate. For full information on making geopolymeric concrete in situ in the quarries, see the debates published in the Journal of Geological Education (see the Library for the list of references and also Archaeology applications ).