Cay Sandstone or “Beach Rock” (13) Published February 17, 2013 at 2240 × 1700 in Cay Sandstone or “Beach Rock” Cay Sandstone or “Beach Rock” (13) – Impression of a coral in recently formed Cay Sandstone or “Beach Rock” on Normanby Island, Queensland, Australia, part of the Frankland Islands group. P1180651aBlog13 About these ads