sedimentary rocks and landforms eroded by wave action

coastal erosion sedimentary rocks stratum landform limestone marl black shale rhytmite formations stratification lithology geological pedruquios madero costa quebrada joint diaclasa sand marlstone eroded white brown materials sediments turonian cenomanian rock lithological contact layers fracture weathered wave cove sea cliff carbonate marine coastline cantabrian coast displacement litoral liencres broken cantabria spain landforms action beach cliffs northern