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How are igneous rocks and metamorphic rocks similar?
They both are formed by intense heat. However, metamorphic rocks are formed by intense heat and pressure, while igneous rocks are just dried lava/magma.
Why would you expect a metamorphic rock to form at a temperature lower than a melting point rock?
Metamorphic rocks form by rocks being changed while still in the solid state. If the temperature of a rock exceeds its melting point, it will melt and any rock that forms as a result will be considered igneous.
What three factors can create metamorphic rocks?
there are not three factors. Metamophic rocks are formed by heat and pressure. the heat sort of melts it slowly while the pressure compacts it. For an animation of the formation go to http://www.classzone.com/books/earth_science/terc/content/visualizations/es0607/es0607page01.cfm?chapter_no=visualization :)
What process found at a divergent boundary will help form the following rocks?
The process of upwelling magma is found a divergent boundaries. As this magma nears the surface it decompresses, and some of it flows onto the surface of the Earth as lava. Magma that solidifies beneath the surface of the Earth hardens into gabbro while lava on the surface of the Earth hardens into basalt. Both of these are igneous rocks. Metamorphic rocks are formed from the heat flowing from the igneous rocks. Sedimentary rocks are formed from the sediments collecting in the basins created from rifting (that is, the divergent boundaries). Metamorphic and sedimentary rocks are not considered to be formed at divergent boundaries.
Is magma the source of all rocks on earth?
No, while all rocks on Earth were molten at one point, most rock types do not form from magma. Rocks that form from magma or lava are igneous rocks. Most of the rocks at Earth's surface are sedimentary. These rocks form from the remains of rock that have been broken own into tiny pieces or dissolved in water. These components eventually settle, usually in a body of water, and are buried and turned to stone. Metamorphic rocks make up a third category. These form from rocks that have been altered under enormous heat and pressure while remaining solid.
Why do metamorphic rocks often formed deep under the surface of the earth?
Metamorphic rocks are often found deep under the earth's surface because metamorphic rocks form from heat and pressure. Therefore, they form while they are under the earth's surface.
How are igneous rocks and metamorphic rocks similar?
They both are formed by intense heat. However, metamorphic rocks are formed by intense heat and pressure, while igneous rocks are just dried lava/magma.
How many metamorphic rock are there?
Metamorphic rocks have been modified by heat, pressure and chemical process usually while buried deep below Earth's surface. Exposure to these extreme conditions has altered the mineralogy, texture and chemical composition of the rocks. There are two basic types of metamorphic rocks: 1) foliated metamorphic rocks such as gneiss, phyllite, schist and slate which have a layered or banded appearance that is produced by exposure to heat and directed pressure; and, 2) non-foliated metamorphic rocks such as marble and quartzite which do not have a layered or banded appearance. Pictures and brief descriptions of some common types of metamorphic rocks are provided below.
Why are metamorphic rocks foliated while others are not?
In order to foliate, rocks must have pressure along one axis and contain minerals with specific growth patterns
What is the difference of a metamorphic rock and a sedimentary rock?
The difference of metamorphic rocks from igneous and sedimentary rocks is on the way these rocks are formed. Igneous rocks form when magma cools down and becomes solid while sedimentary rocks form due to erosion and weathering of the Earthâ??s material, whereas, metamorphic rocks are formed as a result of rock transformation called metamorphism.
What is the main difference between metamorphic rocks and igneous rocks?
Igneous rock forms when molten minerals cool from a liquid into a solid. Metamorphics forms deep under earth's crust where it's really hot. Heat and pressure changes the rock's properties, eventually turning it into an metamorphic rock.
How different rocks are formed?
Rocks can be formed by particles of pebbles, sand or shells creating sedimentary rocks. When molten rock cools and hardens it will form igneous rocks. When there is pressure and intense heat on rocks, they form metamorphic rocks.
Why would you expect a metamorphic rock to form at a temperature lower than a melting point rock?
Metamorphic rocks form by rocks being changed while still in the solid state. If the temperature of a rock exceeds its melting point, it will melt and any rock that forms as a result will be considered igneous.
What three factors can create metamorphic rocks?
there are not three factors. Metamophic rocks are formed by heat and pressure. the heat sort of melts it slowly while the pressure compacts it. For an animation of the formation go to http://www.classzone.com/books/earth_science/terc/content/visualizations/es0607/es0607page01.cfm?chapter_no=visualization :)
Why do metamorphic rocks often form deep under the surface of the earth?
Metamorphic rocks are often found deep under the earth's surface because metamorphic rocks form from heat and pressure. Therefore, they form while they are under the earth's surface.
What term is used to describe metamorphic rocks with a banded texture?
The two main groups of metamorphic rocks are foliated and non-foliated. Foliated metamorphic rocks show layering and parallel alignment of flat mineral crystals (ex. micas). The "banded texture in metamorphic rocks" is one of the specific kinds of foliated textures. It is referred to as gneissic banding. Essentially, this texture displays alternating layers of light and dark minerals. These rocks are called gneiss- the light bands form from quartz and feldspars, while the dark ones form from ferromagnesian minerals.
What are the difference between igneous and metamorphic?
Igneous rocks form from when molten rock (magma under ground or lava on the surface) cools and solidifies. Metamirphic rocks result from other rocks being modified under heat and pressure while still in the solid state.
