Metamorphic rocks were once igneous or sedimentary rocks, but have been changed (metamorphosed) as a result
of intense heat and/or pressure within the Earth’s crust
. They are crystalline and often have a “squashed” (foliated or banded) texture.
What four characteristics determine the type of metamorphic rock?
- Chemical Composition of the Protolith. The type of rock undergoing metamorphism is a major factor in determining what type of metamorphic rock it becomes. …
- Temperature. …
- Pressure. …
- Fluids. …
- Time. …
- Regional Metamorphism. …
- Contact Metamorphism. …
- Hydrothermal Metamorphism.
How can you identify a metamorphic rock?
Metamorphic rocks are rocks that have become changed by intense heat or pressure while forming. One way to tell if a rock sample is metamorphic is
to see if the crystals within it are arranged in bands
. Examples of metamorphic rocks are marble, schist, gneiss, and slate.
What are the key characteristics used to identify rocks?
Key Concepts
Properties that help geologists identify a mineral in a rock are:
color, hardness, luster, crystal forms, density, and cleavage
.
What are the two classifications of metamorphic rock?
Metamorphic rocks are broadly classified as
foliated or non-foliated
.
What are the 3 main types of metamorphic rocks?
The three types of metamorphism are
Contact, Regional, and Dynamic metamorphism
. Contact Metamorphism occurs when magma comes in contact with an already existing body of rock. When this happens the existing rocks temperature rises and also becomes infiltrated with fluid from the magma.
What are the five characteristics of a rock?
Rocks are classified according to characteristics such as
mineral and chemical composition, permeability, texture of the constituent particles, and particle size
. These physical properties are the result of the processes that formed the rocks.
What are 3 facts about metamorphic rocks?
The word metamorphic literally means “changed form”.
Slate
, a metamorphic rock, can form from shale, clay or mudstone. The Taj Mahal in India is made entirely of different types of marble, a metamorphic rock. Serpentine is a type of metamorphic rock that originates as the igneous rock periodite.
What are the example of metamorphic rock?
Common metamorphic rocks include
phyllite, schist, gneiss, quartzite and marble
. Foliated Metamorphic Rocks: Some kinds of metamorphic rocks — granite gneiss and biotite schist are two examples — are strongly banded or foliated.
What are the six characteristics used to identify rocks?
Most minerals can be characterized and classified by their unique physical properties:
hardness, luster, color, streak, specific gravity, cleavage, fracture, and tenacity
.
What 3 characteristics are used to classify rocks?
Rocks can be classified into types by testing for certain characteristics. These tests include
hardness, streak or color, acid, and magnetism
.
What are the 2 most important characteristics used to identify rocks?
The following properties are very useful for identification purposes:
Hardness
.
Cleavage
.
Luster
.
What is the structure of metamorphic rocks?
Metamorphic rocks are often intimately related to large-scale (kilometres of tens of kilometres) structural features of Earth. Such features include
folds, nappes, and faults with a wide variety of geometries
.
What is the texture of metamorphic rocks?
| Metamorphic Rocks | N O T F O L I A T E D | APHANITIC OR PHANERITIC | Fine- to coarse-grained, GRANOBLASTIC texture | ROCK NAME | QUARTZITE |
|---|
What is the shape of metamorphic rock?
Other minerals, with hornblende being a good example, are longer in one direction,
linear
like a pencil or a needle, rather than a planar-shaped book. These linear objects can also be aligned within a rock. This is referred to as a lineation. … Foliated metamorphic rocks are named based on the style of their foliations.
What is the most common type of metamorphic rock?
Quartzite and marble
are the most commonly used metamorphic rocks. They are frequently chosen for building materials and artwork.
