Archive for the ‘industrial rocks and minerals’ Category

Igneous rock

Igneous rock is one of the three main rock types (the others being sedimentary and metamorphic rock). Igneous rock is formed by magma (molten rock) being cooled and becoming solid . They may form with or without crystallization, either below the surface as intrusive (plutonic) rocks or on the surface as extrusive (volcanic) rocks. This [...]

Posted on March 9, 2009 at 17:23 by admin · Permalink · Comments Closed
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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: , , ,