Ключевые слова: aragonite, artificiallight, bedrock, buildingmaterial, calcite, calcium, calciumcarbonate, carbonate, carbonicacid, cave, cavern, caving, cement, concrete, coral, crystalform, curiousform, dissolution, eroded, erosion, foraminifera, geologicalfact, geology, groundwater, karst, karsticformation, lime, limestone, lit, mineral, namsongriver, nature, organicacid, potholing, rainwater, river, rockcolumn, sedimentary, solublerock, solutional, speleogenesis, speleology, speleothem, spelunking, stalactite, stalagmite, underground, water,