![Stalactites hanging from the roof of a limestone cave. Limestone is a sedimentary rock made up mostly of the mineral calcium carbonate. This mineral i Stock Photo - Alamy Stalactites hanging from the roof of a limestone cave. Limestone is a sedimentary rock made up mostly of the mineral calcium carbonate. This mineral i Stock Photo - Alamy](https://c8.alamy.com/comp/2ADFNRY/stalactites-hanging-from-the-roof-of-a-limestone-cave-limestone-is-a-sedimentary-rock-made-up-mostly-of-the-mineral-calcium-carbonate-this-mineral-i-2ADFNRY.jpg)
Stalactites hanging from the roof of a limestone cave. Limestone is a sedimentary rock made up mostly of the mineral calcium carbonate. This mineral i Stock Photo - Alamy
![Cave with Stalactites and Stalagmites Calcium Carbonate Rock Formations Stock Photo - Image of nature, natural: 262775992 Cave with Stalactites and Stalagmites Calcium Carbonate Rock Formations Stock Photo - Image of nature, natural: 262775992](https://thumbs.dreamstime.com/z/cave-stalactites-stalagmites-calcium-carbonate-rock-formations-inside-formation-262775992.jpg)
Cave with Stalactites and Stalagmites Calcium Carbonate Rock Formations Stock Photo - Image of nature, natural: 262775992
![Stalactites, Stalagmites, and Cave Formations - Mammoth Cave National Park (U.S. National Park Service) Stalactites, Stalagmites, and Cave Formations - Mammoth Cave National Park (U.S. National Park Service)](https://www.nps.gov/maca/learn/nature/images/20200310_152546.jpg)
Stalactites, Stalagmites, and Cave Formations - Mammoth Cave National Park (U.S. National Park Service)
![GSI Groundwater & Geothermal Unit on X: "Stalagmites are upwardly growing deposits found in caves. They form when a mineral, usually calcium carbonate, gets deposited on the cave floor by drips from GSI Groundwater & Geothermal Unit on X: "Stalagmites are upwardly growing deposits found in caves. They form when a mineral, usually calcium carbonate, gets deposited on the cave floor by drips from](https://pbs.twimg.com/media/E_bOZjOX0AI0jpH.jpg)
GSI Groundwater & Geothermal Unit on X: "Stalagmites are upwardly growing deposits found in caves. They form when a mineral, usually calcium carbonate, gets deposited on the cave floor by drips from
![Inside a cave with calcium carbonate rock formation with stalactites and stalagmites Stock Photo - Alamy Inside a cave with calcium carbonate rock formation with stalactites and stalagmites Stock Photo - Alamy](https://c8.alamy.com/comp/2PD65G7/inside-a-cave-with-calcium-carbonate-rock-formation-with-stalactites-and-stalagmites-2PD65G7.jpg)
Inside a cave with calcium carbonate rock formation with stalactites and stalagmites Stock Photo - Alamy
![Cave with Stalactites and Stalagmites Calcium Carbonate Rock Formations Stock Image - Image of stalagmite, stone: 262775989 Cave with Stalactites and Stalagmites Calcium Carbonate Rock Formations Stock Image - Image of stalagmite, stone: 262775989](https://thumbs.dreamstime.com/b/cave-stalactites-stalagmites-calcium-carbonate-rock-formations-inside-formation-262775989.jpg)
Cave with Stalactites and Stalagmites Calcium Carbonate Rock Formations Stock Image - Image of stalagmite, stone: 262775989
![Calcium carbonate deposits, stalactites, in Diros cave near Pirgos Dirou in the Deep Mani, Southern Peloponnese, Greece Stock Photo - Alamy Calcium carbonate deposits, stalactites, in Diros cave near Pirgos Dirou in the Deep Mani, Southern Peloponnese, Greece Stock Photo - Alamy](https://c8.alamy.com/comp/ER2CX1/calcium-carbonate-deposits-stalactites-in-diros-cave-near-pirgos-dirou-ER2CX1.jpg)
Calcium carbonate deposits, stalactites, in Diros cave near Pirgos Dirou in the Deep Mani, Southern Peloponnese, Greece Stock Photo - Alamy
![Stalactites. Stalactites hanging from the roof of a limestone cave. Stalactites are created by calcium carbonate, dissolved in ground water, dripping Stock Photo - Alamy Stalactites. Stalactites hanging from the roof of a limestone cave. Stalactites are created by calcium carbonate, dissolved in ground water, dripping Stock Photo - Alamy](https://c8.alamy.com/comp/2ADFNR8/stalactites-stalactites-hanging-from-the-roof-of-a-limestone-cave-stalactites-are-created-by-calcium-carbonate-dissolved-in-ground-water-dripping-2ADFNR8.jpg)
Stalactites. Stalactites hanging from the roof of a limestone cave. Stalactites are created by calcium carbonate, dissolved in ground water, dripping Stock Photo - Alamy
![Calcium carbonate deposits, stalactites, in Diros cave near Pirgos Dirou in the Deep Mani, Southern Peloponnese, Greece Stock Photo - Alamy Calcium carbonate deposits, stalactites, in Diros cave near Pirgos Dirou in the Deep Mani, Southern Peloponnese, Greece Stock Photo - Alamy](https://c8.alamy.com/comp/ER2CWX/calcium-carbonate-deposits-stalactites-in-diros-cave-near-pirgos-dirou-ER2CWX.jpg)