Page "Pyramid of Khafre" Paragraph 6

The bottom course of casing stones was made out of pink granite but the remainder of the pyramid was cased in Tura Limestone.

Close examination reveals that the corner edges of remaining casing stones are not completely straight, but are staggered by a few millimeters.

One theory is that this is due to settling from seismic activity.

An alternative theory postulates that the slope on the blocks was cut to shape before being placed due to the limited working space towards the top of the pyramid.