"ENVO"^^ . "sinkhole"^^ . "A natural depression or hole in the surface topography caused by the removal of soil or bedrock, often both, by water. Sinkholes may vary in size from less than a meter to several hundred meters both in diameter and depth, and vary in form from soil-lined bowls to bedrock-edged chasms."^^ . . "FTT:1073"^^ . "Geonames:T.SINK"^^ . "SWEETRealm:Sink"^^ . "ENVO:00000195"^^ . "TGN:21371"^^ . "EcoLexicon:sink_hole"^^ . "FTT:1074"^^ . "Wikipedia:Sinkhole"^^ . "sink"^^ . "cenote"^^ . . "basin"^^ .