Igneous rocks formwhen magma (molten rock) cools and crystallizes, either at volcanoes on the surface of the Earth or while the melted rock is still inside the crust. All magma develops underground, in the lower crust or upper mantle, because of the intense heat there. How do igneous rocks...
How do you tell if a metamorphic rock is foliated or Nonfoliated? Foliated rocks are types of metamorphic rock that have parallel bands of grain. Non-foliated rocks aretypes of metamorphic rock that have no arrangement or bands of grain. Marble is a type of metamorphic rock that originate...
How do you determine nonconformity? Nonconformities are unconformities that separate igneous or metamorphic rocks from overlying sedimentary rocks. They usually indicate thata long period of erosion occurred prior to deposition of the sediments(several km of erosion necessary). ...
Rocks are classified according to characteristics such asmineral and chemical composition, permeability, texture of the constituent particles, and particle size. ... This transformation produces three general classes of rock: igneous, sedimentary and metamorphic. What do geologists use to study different ...