please answers this please?

Question

limestone reefs from from the hard outer coverings of corals that became cemented together? Is that true yes or no please answers this thanks

Answer 1

Actually, living animals, i.e. tube worms, mollusks, conch, etc. utilize calcium carbonate from the water column to create their protective shells. Any ocean creature that has a hard shell will grab tiny bits of calcium carbonate out of the water and begin to build their shells. Once the animal out grows its shell, it will leave and begin building another shell.

When the animals abandon their shells these will accumulate and begin forming a "reef". In fact, most of the worlds limestone and dolomite are formed from creatures that once lived in the worlds oceans.

To answer your question, Yes. Prehistoric and present day ocean animals are responsible for coral reefs.

If you live in an area that contains limestone layers, find an outcrop of exposed rock (near roads) and look closely. You will find crinoids (circular tubes, "indian beads") in the rock.

Hope this helps.

Answer 2

Is it so hard to type "coral reef" into Google or Wikipedia? Is it so hard to pay attention in class?

http://en.wikipedia.org/wiki/Coral_reef

Answer 3

Yes.