stone formation
- stalactiteHanging cave mineral deposit
- stalagmiteUpward-growing cave deposit
- caveUnderground hollow in rock
- calciteCrystalline calcium carbonate
- mineralNaturally formed crystalline solid
crystal · limestone · deposit · grotto · drip · sediment · geode · petrified · cavern · flowstone · column · rock · geological · accretion · underground · ancient · layered · dripstone
material composition
stone formationvegetation
Plant life collectively
coral reef · peat bog · mud flat · organic matter · cloud formation
formation process
stone formationerosion
Gradual wearing away
dissolution · weathering · mineral dissolution · cave collapse · degradation
origin
stone formationsynthetic material
Human-made substance, not natural
built environment · architectural structure · sculpture · artificial reef