❓ why
Why do coral reefs turn into limestone over time?
Quick Answer
Coral skeletons are made mainly of calcium carbonate. When reefs are buried and compacted, those skeletal remains can harden into limestone.
The Full Story
Corals build their skeletons from calcium carbonate, the same mineral family found in limestone and chalk. As coral reefs grow, dead skeletons accumulate beneath living corals. Over long periods, burial, compaction, and cementation turn those skeletal remains into solid rock. This is one reason many limestone formations are actually ancient reef systems. The process links living marine ecosystems with long-term rock formation in the carbon cycle.
Key Facts
1.Coral skeletons are calcium carbonate
2.Buried reef material can become limestone
3.Many limestones are ancient reefs
YouTube Angle
Suggested video title for this topic:
"How living coral becomes rock over millions of years"
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