0
Metamorphic Rock
Metamorphic rocks are formed from other types of rocks. The original rock is exposed to conditions such as heat or pressure. Carbon turning to diamonds while under extreme pressure is an example of a metamorphic rock.
653 Questions
What are metamorphic rocks that have banded appearance due to alignment of materials called?
Metamorphic rocks that have a banded appearance due to the alignment of minerals are called foliated metamorphic rocks. This banding occurs as a result of directional pressure during metamorphism, causing the minerals to realign and form distinct layers or bands. Common examples of foliated metamorphic rocks include schist and gneiss.
Is black tourmaline metamorphic?
Black tourmaline, also known as schorl, is not classified as a metamorphic rock itself; rather, it is a mineral that can form in various geological environments, including igneous and metamorphic settings. It is commonly found in granite and other crystalline rocks and can also occur in metamorphic rocks where it may form from the alteration of other minerals. While the mineral can be associated with metamorphic processes, it is not exclusively a metamorphic mineral.
Which aspect of metamorphic rock does plastic deformation change?
Plastic deformation in metamorphic rock primarily alters the rock's texture and structure. It affects the alignment of mineral grains, leading to foliation or lineation, which can enhance the rock's strength and change its overall appearance. This process occurs under high temperature and pressure conditions, allowing minerals to recrystallize and reorganize without breaking. Consequently, plastic deformation significantly influences the physical characteristics and properties of the metamorphic rock.
If the rock type around your home is primarily metamorphic, you are unlikely to find many fossils. Metamorphic rocks form under high pressure and temperature, which typically destroys any fossils that might have been present in the original sedimentary rock. Fossils are more commonly found in sedimentary rocks, where the conditions are conducive to preserving organic remains. Therefore, the chances of finding fossils in metamorphic rocks are minimal.
What bases can metamorphic rocks be identified?
I am doing a lab and was wondering the same thing. I found out that you have to look at the rocks foliage. If it is foliated or nonfoliated. ( foliation- a process which minerals are aligned in rocks such that they are easy to split either in half or small thin slices).
Can metamorphic rocks be formed by the formation of minerals from a solution?
Rock formed from minerals that precipitate from saturated solutions are called chemical sedimentary rocks, such as rock salt and rock gypsum.
In some metamorphic rock processes, the loss of fluid due to heat and pressure can cause the transformation of some minerals into other minerals, but this is a different process than that which is causing precipitation from a saturated solution. In retrograde metamorphism, hydration (the addition of water) can also cause the transformation of some minerals.
Why doesn't pumice or obsidian turn into a metamorphic rock?
Pumice and obsidian are both forms of volcanic glass, which weathers away fairly easily.
It Means a group of companies or a local firm or organisation having business units in different sectors; with the big sales and turnovers.
Generically it is displaying a metamorphic fabric, specifically a schistosity. If the fabric is well developed it could also be displaying planes of cleavage.
For metamorphic rock to become igneous rock what steps are necessary?
Metamorphic rock can not become igneous rock, however igneous rock can become metamorphic. This process happens over time as the rocks are shifted, compressed and heated by the Earth.
Where can one purchase soapstone countertops?
Those interested in purchasing soapstone countertops can do so at a couple of retailers currently. Those are Cabinet Parts, Bevel Edge, and also eBay, which has a lesser selection.
Can igneous rock become metamorphic rock without first becoming sedimentary rock?
Yes. A prime example is that granite can undergo metamorphism and become gneiss.
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.
What kind of mineral is soapstone?
Soapstone is a type of metamorphic rock. Soapstone is also known as steatite or soaprock. It is made from the mineral talc. Soaprock has been used for centuries for sculptures and even kitchen counter tops.
