Fig. 2

a Cross section and b Plan of the Sahure pyramid. The colors in cross-section represent the white fossiliferous limestone from the Tura quarry (casing stone, in white); the body of the pyramid made by laminated sandy argillaceous limestone (marl, in white gray); granite (casing for entrance and some parts in the corridor, in red); and bedrock from limestone (in dark gray). Edited after Ref. [35]