submerged tree trunks in the cold alpine lake riedener see with the azur coloration caused by calcite platelets

wetland wildlife pond water reflection swamp nature river tree marsh stream wilderness lake plant decomposition green scenic surface azure multicolored trunk lakeshore cold clear forest travel fallen wild mikado decompose chemical reaction coloration light blue trunks trees submerged underwater spring sedimentation riedener moor calcareous moorland rieden austria alps alpine calcite platelets outdoor natural mirror landscape fresh environment clean beautiful azur caused