Parnassus limestones. A. Outcrop observed near the Stadium Quarry showing centimetric oncoïds (1) and microkarsts (2). B. Sample observed near the Stadium Quarry showing the two subfacies observed in the Parnassus Massif. The pen is 12 cm long. C. Block of Parnassus limestone employed in the Apollo Sanctuary showing a high degree of karstification with microkarsts (2). D. Microscopic view showing a subfacies of the Parnassus limestones: an oolitic grainstone (3). E. Microscopic view of a subfacies of Parnassus limestones: a wackestone composed of pellets and biological remains in a micritic cement (4).