These images are essentially the same thing, calcium carbonate. Evaporites are minerals such as halite, calcite and dolomite that are found in shallow seas. They can grow and evaporate within marine environments. After they dissolve into the sea, they form into the hard shells of aquatic animals. When those animals die the calcium carbonate falls to the bottom of the sea. This sediment will, with time, form into coral. As the tides lower the coral reefs are exposed to air, and the evaporite minerals are able to form again. In a way this series of events could be interpreted as one example of reincarnation. The definition of reincarnation is the rebirth of a soul into a new body. Who knows exactly what a soul is? I might argue that a soul, simply put, is a form of energy and that so is calcium carbonate.