Is there water in rocks

Answer 1

This depends on the specific characteristics of the rock in question.

Sedimentary rocks such as sandstones may be highly porous (i.e. they have a large number of voids within them known as pore spaces) and as such may be very effective at storing water. Other sandstones may have a silica or calcite cement matrix that has formed around the clasts, greatly reducing porosity and meaning they are poor at storing water.

Igneous rocks such as granite or basalt are generally very poor at storing water as they are formed of tightly interlocking crystals and so have extremely low porosities.

Answer 2

In most cases it is not water present as H2O but the chemical components of water, hydrogen and oxygen, that have been incorporated into some of the minerals. When sediment becomes sedimentary rock water trapped in that sediment will break apart and bond with oxides already present in the minerals to form hydroxide ions (OH-), which become part of new minerals. Water becomes similarly incorporated into the mantle as it is carried down by subducting tectonic plates. As a result the chemical components of water may also be found in some igneous rocks.

Answer 3

There certainly is water of crystallization, as in limestone for example. And many rocks such as sedimentary certainly have unbound water.

Answer 4

Many types of rock contain water in so-called "hydrated minerals." This is also known as the water of crystallization, because it appears in crystalline salts.

Answer 5

Yes, because some rocks are porous

Answer 6

Yes