autumn in the studlagil canyon - basalt rock columns and glacial river jokuldalur, east iceland

aluminium aphanitic autumn basalt brown canyon cliff coast column columns cooling curved dangerous dsc duncan east egilsstadir extrusion extrusive formation geology glacial glaciel glacier gorge halslon heat highlands hydroelectric hálslón iceland igneous iron jokuldalur karahnjukavirkjun landscape lava low-viscosity mafic magnesium metamorphic mountain mountains nature pillar pillars rapid reservoir reydarfjordur river rock sea shore sony stream studlafoss studlagil stuðlagil terrain twisted valley volcano wadi water waterfall waterway