In the beginning God created the heavens and the earth. Now the earth was formless and empty, darkness was over the surface of the deep, and the Spirit of God was hovering over the waters.

rocks that slowly dissolve in the presence of water

Algar do Carvao is a remarkable 90 metre-deep volcanic chimney formed approximately 3,200 years ago after the magma drained from the main chimney receding to the magma chamber. A lake is sustained by rain water that goes in through the vent and infiltration processes, resulting in a constant dripping. There are also some small underwater springs

While the total volume of water on Earth stays about the same, water continually changes location and state.

The hydrologic cycle is sensitive to changes

the water on Earth may have come from the melting of water-rich minerals during the formation of the planet and icy comets that, billions of years ago, smashed into Earth and melted