Fig. 2.  Photograph showing two generations of boulders (breccia–conglomerate facies) in the lower bioherms below the prominent +25 m terrace at Heraion. Vertical field of view is c. 10–12 m. Arrow A shows a large boulder (>2 m long axis) of bioherm framework, which is overgrown by subsequent bioherm growth to the cliff top. This relationship demonstrates collapse of bioherm framework early in growth, followed by the main phase of Rivularia growth, to form the giant bioherms. Arrow B shows smaller wave-rounded boulders that post-date bioherm framework growth as part of a cave fill unrelated to faulting.