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How do high temperatures and pressures cause fossils to change into minerals or rocks to change their nature?
The changes take place because of recrystallization or realignment of existing minerals, or creation of minerals from existing assemblages that that can only be formed under certain specific ranges of temperature or pressure.
Why do minerals in metamorphic rocks often rearrange in layers?
The alignment of minerals into bands (foliation) is caused by the massive force of pressure and high temperature which results from mountain building processes caused by plate collisions. The heat and pressure combine to realign the existing minerals from a random orientation to one of parallel orientation, thus creating the visible lines or platy cleavages found in foliated metamorphic rocks. The lines of foliation are created perpendicularly to the force being applied.
Is magma a example of a mineral that indicates that a metamorphic rock was formed in a great depth and under a extreme heat and pressure?
No, magma itself is not a mineral; it is a molten rock that can crystallize to form igneous rocks. Metamorphic rocks, on the other hand, form from existing rocks (igneous, sedimentary, or other metamorphic rocks) under extreme heat and pressure, typically deep within the Earth. The presence of certain minerals, such as garnet or kyanite, can indicate the conditions of high pressure and temperature during metamorphism.
Why vesicular texture is associated with peridotites?
Peridotites are invasive rocks formed underneath the earth's surface and the high pressure conditions Dodge gases from forming and getting away
What is the similarities between high end low pressure?
what are the similarities between high and low pressure
What are rocks called with alternating bands of light and dark silicate minerals?
Rocks with alternating bands of light and dark silicate minerals are called gneiss. Gneiss is a metamorphic rock formed under high temperature and pressure conditions, which causes the minerals within it to align in bands or layers.
What Wavy bands of light and dark minerals visible in gneiss probably formed from the?
The wavy bands of light and dark minerals visible in gneiss likely formed from the process of high-grade regional metamorphism, where pre-existing rocks (such as granite or sedimentary rocks) were subjected to intense heat and pressure. This metamorphic process causes the minerals to recrystallize and segregate based on their composition, resulting in the characteristic banding. The light bands are typically rich in quartz and feldspar, while the dark bands are often composed of biotite, amphibole, or other mafic minerals. The wavy appearance of the bands can also reflect the dynamic conditions of deformation during metamorphism.
What is composed of alternating bands of light and dark silicate minerals?
A gneiss rock is composed of alternating bands of light and dark silicate minerals, typically formed through high temperature and pressure metamorphism of existing rocks like granite or shale. The light bands are usually composed of quartz and feldspar, while the dark bands are made up of minerals like biotite, amphibole, or pyroxene.
What is a rock in which coarse-grained minerals separate into distinct bands?
A rock in which coarse-grained minerals separate into distinct bands is called a gneiss. Gneiss forms due to high temperature and pressure, causing the minerals to recrystallize and segregate into light and dark bands.
What are Bands of high pressure and low pressure found every thirty degrees latitude called?
The bands of high pressure are called subtropical high-pressure belts, while the bands of low pressure are known as the intertropical convergence zone (ITCZ) or the equatorial low-pressure belt. These belts play a significant role in global atmospheric circulation.
What is the original source for diamonds?
The original source for diamonds is carbon. They are formed by reaction of the high temperature and pressure in the Earth's mantle on minerals containing carbon.
Minerals formation caused by high pressure and high temperatures lives most likely occur in what environment?
Deep in the Earth is where minerals form. This causes high pressure and temperatures.
What are foliated rocks and how do they form?
An example of a foliated rock is slate. You can distinguish a foliated rock by the fact that the minerals line up in a sheet-like appearance. They are formed by pressure squeezing the minerals into alignment.
How is Lapis Lazuli formed?
Lapis lazuli is formed through a metamorphic process of combining minerals such as lazurite, calcite, and pyrite. It typically forms in limestone where sulfur deposits interact with minerals during high-pressure and high-temperature conditions. The blue color of lapis lazuli comes from the presence of the mineral lazurite.
Gneiss is formed from what rock?
Gneiss is a metamorphic rock. It is formed form another metamorphic rock called schist (sh-ist). Schist is formed form fine grained sedimentary rock (often shale). While gneiss is formed by great pressure from moving plates of the earth's crust.
What happen to minerals when rocks becomes a metamorphic rocks?
Metamorphic rocks are created from rocks that are deformed by tectonic forces and/or are brought to temperature that are much different from those that they were first formed in (usually hotter). The effect of increased temperature is the growth of minerals from others that are no longer stable under the changed pressure and temperature conditions (e.g. diamond is formed from graphite under very high pressure and garnet growths at high temperatures and pressures from aluminium rich usually sedimentary rocks). The effect of shear stress on the rock (i.e. directed force creating not only compression but also deformation) is the change of shape of minerals as well as rotation and alignment of platy minerals into bands. These processes lead to the usually banded appearance of metamorphic rocks.
Are diamonds minerals when you use carbon to high pressure?
Yes.
