Preserved margin of a coral carbonate plarform. Miocene (Tortonian) of Mallorca (Balearic Islands - Spain). Visible the well bedded fore-reef sediments (left), the massive reef facies, characterized by prograding clinoforms and very thick depositional bodies, passing to the right into bedded back-reef facies.
<a href="//commons.wikimedia.org/wiki/User:Antonov" title="User:Antonov">Antonov</a>
<span class="int-own-work" lang="en">Own work</span>