sea stack and sandy beach by the cantabrian coast

cantabria costa quebrada shoreline sea rocky nature natural abrasion platform wavecut ocean erosion landscape beach scenery scenic shore coastal coastline litoral environment playa arnia santander liencres spain tide stone sedimentary rock stack broken coast marl limestone sandstone geology blue water cantabrian atlantic overcast cliff steep inlet sand cantabrico gelidium sesquipedale seaweed vertical outcrop sandy stacks farallones