steep rock formation at zumaya in spain: a sequence of shales interbedded with sandstones

flysch ibilbidearen hasiera basque country beach beauty nature cantabrico cliff coast coastal coastline fissile rock formation geologic geological geology gipuzkoa guipuzcoa province hondartza itzurun laminated structure landscape scenery mudstone outdoor overcast rocky rough sea sand sandbeach sandstones scenic seascape sedimentary shales shore shoreline spain spanish stone material summer textured tourist attraction destination water zumaia zumaya interbedded steep spain: