abstract accretions accumulated accumulations coloration coloring colors colouring colours columns crystallisation crystallise crystallization crystallize deposits distinctive edge edges formation forms glassy layered layers levels light shape shaped shapes slow slow-growth slowly smooth surface surfaces texture textures unusual bio-chemical-accretionary-structures cementation columnar cumulative-structures excretions formations formed forming fossils high-saline-levels lake living-fossils living-rocks microbialites microorganisms natural park rock-structure sedimentary-grains shallow-water stromatolite stromatoliths structures art artistic artwork bright color colorful colour colourful decorative down fantastic fantasy green lit multicolored multicoloured pointed red stalactites stalagmites subterranean suspended UP yellow