Metamorphic rock

Metamorphic rock is the result of the transformation of an existing rock type, the protolith, in a process called metamorphism, which means “change in form”. The protolith is subjected to heat and pressure (temperatures greater than 150 to 200 °C and pressures of 1500 bars[1]) causing profound physical and/or chemical change. The protolith may be [...]

Posted on March 9, 2009 at 17:35 by admin · Permalink · Comments Closed
In: industrial rocks and minerals · Tagged with: 

Rock cycle

The rock cycle is a fundamental concept in geology that describes the dynamic transitions through geologic time among the three main rock types: sedimentary, metamorphic, and igneous. As the diagram to the right illustrates, each type of rock is altered or destroyed when it is forced out of its equilibrium conditions. An igneous rock such [...]

Posted on March 9, 2009 at 15:55 by admin · Permalink · Comments Closed
In: industrial rocks and minerals · Tagged with: , , ,