sharp edged tilted lava rock layers exposed at low tide

algarve algarvian are basalt beach beautiful black blue castelejo coast coastal coastline covered dark edged empty europe expose exposed formations geological horizon igneous landscape lava layered layers low magmatic natural nature nobody ocean outdoors paradise polyp portugal praia pretty reef rock rocks sand sandy scene scenic sea seascape seaside sharp shore sky slanted stone summer summertime they tide tilted travel view volcanic vulcanology water waves wide wild with