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The core blocks upon which these texts occur were quarried on the Giza plateau, perhaps
from one of the quarries on either side of the causeway, so their transport
offered little opportunity for the mixing of blocks quarried at different periods.
In addition, the geological layering in these blocks shows that they were
frequently placed together in the temple wall just as they had been in the earth.
In some cases one can see a vein of softer rock running the length of a wall.36 [Mark Lehner]
These core blocks were generally laid in segments, having previously been
fitted together,37 probably at the quarry. The simplest procedure would have
been to fit together a row of blocks that had been quarried from the same area
At this point, each of the series of fitted blocks would have been marked with
the hieroglyph of the division that was responsible for placing the block
correctly in the temple. (Roth, Egyptian Phyles, 1991: 128, 130.

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: … the limestone block on the eastern side of doorway (14) is set on end with the strata vertical instead of horizontal, an abnormal position, and on this stone the inscription stands also on end, having been written along the horizontal strata as in all other stones (Reisner, G.A., Mycerinus, 1931: 273).