How are stalagmites and corals similar?

Stalagmites and corals are similar in that both are formed through the accumulation of calcium carbonate, resulting in their characteristic structures. Stalagmites develop in caves from mineral-rich water dripping from ceilings, while corals create their skeletons by secreting calcium carbonate as they grow in marine environments. Both structures also exhibit growth patterns over time, reflecting environmental conditions and contributing to their respective ecosystems. Additionally, they both play significant roles in their habitats, with stalagmites contributing to cave ecosystems and corals forming vital coral reefs.