1, No. 8, Nov. - Dec., 1893 The Structures, Origin, and Nomenclature... The Structures, Origin, and Nomenclature of the Acid Volcanic Rocks of South Mountain This is the metadata section. Skip to ...
Colorado's Rocky Mountains ... down beneath the porous surface of a volcanic area. As the water percolates into the Earth's crust, it encounters rock heated by magma. When the water circulates ...