The rock formation above shows an angular unconformity found on the coast of Portugal at Telheiro Beach . Rock layers that break the sedimentary sequence and contact at noticeably different angles are referred to as an angular unconformity. Here, severely folded schists and metagreywackes of the Brejeira Formation, dating from the Upper Carboniferous are positioned beneath horizontally layered new red sandstones of the Grés de Silves Formation, dating from the Triassic . For purposes of scale note the person at the bottom of the cliff. Photo taken on April 10, 2009.