<P> The rich mineral content is provided by the underground geological layers and pushed up to the surface by the hot water ( at about 1.2 MPa ( 170 psi ) pressure and 240 ° C ( 464 ° F ) temperature ) used by the plant . Because of its mineral concentration , water can not be recycled and must be disposed of in the nearby landscape , a permeable lava field that varies in thickness from 50 cm ( 20 in ) to 1 m ( 3.3 ft ) . The silicate minerals is the primary cause of that water 's milky blue shade . After the minerals have formed a deposit , the water reinfiltrates the ground , but the deposit renders it impermeable over time , hence the necessity for the plant to continuously dig new ponds in the nearby lava field . </P>
<P> The rich mineral content is provided by the underground geological layers and pushed up to the surface by the hot water ( at about 1.2 MPa ( 170 psi ) pressure and 240 ° C ( 464 ° F ) temperature ) used by the plant . Because of its mineral concentration , water can not be recycled and must be disposed of in the nearby landscape , a permeable lava field that varies in thickness from 50 cm ( 20 in ) to 1 m ( 3.3 ft ) . The silicate minerals is the primary cause of that water 's milky blue shade . After the minerals have formed a deposit , the water reinfiltrates the ground , but the deposit renders it impermeable over time , hence the necessity for the plant to continuously dig new ponds in the nearby lava field . </P>
what makes the blue lagoon in iceland blue
what makes the blue lagoon in iceland blue
The silicate minerals
The silicate minerals