using a “concreting” technique?
That would be a lot of buckets of water to carry up the hill....
Or, the polarity changed in situ over thousands of years to reflect the polarity of the earth
Aliens came down to visit, and used their matter transmitters to create the blocks. Then they moved them into place with their force beams, which also scrambled the magnetic orientation of the rocks.
They also changed the Carbon 14 proportions with their phasers, to mask the date when they did their work.
It seems to me that if the pyramid blocks were cast in spme sort of concrete like mixture, there should be evidence of a texture left by the forms, just as one can see wood patterns in today’s board formed structures. Even if the exposed outer surfaces were worked afterwards to leave a smooth finish, some inner areas should have been revealed over time to show telltale evidence.
A tantalizing study. But, obviously, more samples need to be analyzed. Six locations on two pyramids is not near enough to convince any one.