What is the difference between regional and contact metamorphism include a simple sketch showing the difference?
0:033:14Contace & Regional Metamorphism – YouTubeYouTubeStart of suggested clipEnd of suggested clipThe first type is called contact metamorphism. And the second is called regional metamorphism. SoMoreThe first type is called contact metamorphism. And the second is called regional metamorphism. So let's talk a little bit about the difference between these two.
What is contact metamorphism?
Contact metamorphism. This is metamorphism produced by intrusion of magma. Heat and fluids from the crystallizing magma cause chemical and mineralogical changes in the rocks being intruded.
What is contact metamorphism short answer?
Contact metamorphism is a type of metamorphism that occurs adjacent to intrusive igneous rocks due to temperature increases resulting from hot magma intrusion into the rock. The metamorphosed zone is known as the metamorphic aureole around an igneous rock.
Where do regional and contact metamorphism occur?
Contact metamorphism occurs in the vicinity of an igneous intrusive rock as a result of thermal effects of the hot magma.
What is meant by regional metamorphism?
( rē′jə-nəl ) A type of metamorphism in which the mineralogy and texture of rocks are changed over a wide area by deep burial and heating associated with the large-scale forces of plate tectonics.
What is regional metamorphic rock?
Regional metamorphic rocks occur where rocks are altered by high temperatures and / or high pressures usually deep within the Earth. Regional metamorphism can affect large volumes of the crust and typically happens at convergent plate boundaries, beneath new mountain ranges.
What causes regional metamorphism?
Regional metamorphism is caused by large geologic processes such as mountain-building. These rocks when exposed to the surface show the unbelievable pressure that cause the rocks to be bent and broken by the mountain building process. Regional metamorphism usually produces foliated rocks such as gneiss and schist.
Where does contact metamorphism occur?
Contact metamorphism occurs in the vicinity of an igneous intrusive rock as a result of thermal effects of the hot magma.
How do you identify contact metamorphism?
Contact metamorphism does not involve directed pressure that deforms or squashes the rocks, so contact metamorphic rocks don't usually have foliated textures like textures found in regionally metamorphosed rocks. The non-foliated appearance of rocks like marble and quartzite are often described as granular or sugary.
What is an example of contact metamorphism?
An example of contact metamorphism is limestone surrounding a magma chamber being turned into marble. This process happens because marble is a more stable form of rock in the magma intrusion's high heat area.
What is regional metamorphism short answer?
Regional metamorphism is metamorphism that occurs over broad areas of the crust. Most regionally metamorphosed rocks occur in areas that have undergone deformation during an orogenic event resulting in mountain belts that have since been eroded to expose the metamorphic rocks.
What is regional metamorphism?
Regional metamorphism is metamorphism that occurs over broad areas of the crust. Most regionally metamorphosed rocks occur in areas that have undergone deformation during an orogenic event resulting in mountain belts that have since been eroded to expose the metamorphic rocks.
Where does regional metamorphism occur?
As described above, regional metamorphism occurs when rocks are buried deep in the crust. This is commonly associated with convergent plate boundaries and the formation of mountain ranges. Because burial to 10 km to 20 km is required, the areas affected tend to be large.
What is the difference between contact and regional?
Contact metamorphism is a type of metamorphism where rock minerals and texture are changed, mainly by heat, due to contact with magma. Regional metamorphism is a type of metamorphism where rock minerals and texture are changed by heat and pressure over a wide area or region.
What is regional metamorphism example?
Regionally metamorphosed rocks usually have a squashed, or foliated appearance – examples include slate, schist and gneiss (pronounced “nice”), formed by metamorphism of mudstones, and also marble which is formed by metamorphism of limestone.