Geology and Mining Concepts

Front

The continuous processes that create, change, destroy, and reform rocks over geologic time.

Back

Rock cycle

Front

Rock formed from solidified magma beneath the surface.

Back

Intrusive igneous rock.

Front

Rock formed from lava that cooled at the surface.

Back

Extrusive igneous rock.

Front

Large, visible interlocking crystals due to slow cooling.

Back

Coarse-grained (phaneritic) texture.

Front

Microscopic crystals due to rapid cooling.

Back

Fine-grained (aphanitic) texture.

Front

Texture with large crystals embedded in a fine matrix

Back

Porphyritic texture

Front

Texture containing many gas bubble cavities

Back

Vesicular texture

Front

Silica-rich, light-colored igneous composition

Back

Felsic composition

Front

Silica-poor, dark-colored igneous composition

Back

Mafic composition

Front

An intrusive, coarse-grained, felsic igneous rock.

Back

Granite