Profitis Ilias limestone. A. Sample of limestone from the Profitis Ilias quarry, presenting its natural color light grey and stylolitic joints (1). B. Blocks of Profitis Ilias limestone employed in the Apollo Sanctuary. Stylolitic joints are still visible despite its dark grey patina. C. Microscopic view showing Globotruncana arca (Cushman, 1926) (2) and Globigerina (3) in a micritic cement. D. Specimen of Globotruncana arca (Cushman, 1926) (2), a stylolitic joint (1), a calcisphere (4).