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Limestone

click on picture to enlarge.
photo
Photograph by H.B. Stonehouse
Limestone is composed of calcium carbonate (lime). It may be deposited in shallow warm seas, as is currently happening around the Bahamas. Other limestone beds contain fossils. Fossilized organisms took calcium carbonate from the water to build shells or homes for themselves.

Color: varies
Grains/crystals:
Linearity: none
Density: varies

Other Links:

Questions:

  1. Would you expect to find limestone on any planet or moon other than the Earth? Why or why not?
  2. Under what conditions does limestone form?
  3. Would you find limestone near your home?

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