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yes, it does. when a grain size in an igneous rock is small, it means that it was probably an extrusive rock, meaning it formed on land. but if the grain size is big, it means that the rock most likely formed underground, or it was intrusive. try remembering it like this- the larger the crystals, the more time the rock had to form, and magma cools faster on land, not giving the rocks much time to form.
What else can I help you with?
What are rocks that have a glassy texture called?
Obsidian
Is conglomerate intrusive or extrusive?
Neither. Conglomerate is a sedimentary rock. Intrusive and extrusive are descriptive terms used to classify igneous rocks.
What is the most common type of rock on earth's surface?
Sedimentary Rocks. 75% of rocks exposed to the surface are sedimentary.
What are the 3 kinds of rocks?
Sedimentary, Igneous and Metamorphic.
What are igneous extrusions?
== == Extrusive igneous rocks are formed from the solidification of lava on or above the surface. Rapid cooling from exposure to air or water results in rapid crystallization of their component minerals, normally creating a fine grained texture as opposed to intrusive igneous rocks which have a coarser texture. Examples of extrusive igneous rocks would include obsidian, pumice, basalt, and rhyolite.
What grain type is found in extrusive igneous rocks?
Extrusive igneous rocks are usually fine grained.
What property would be most useful for identifying igneous rocks?
The most useful property for identifying igneous rocks is their mineral composition, particularly the presence and abundance of specific minerals such as quartz, feldspar, and mica. Additionally, texture—such as grain size and the presence of crystals—can provide insight into the rock's cooling history and origin. Color can also be an indicator, as it often relates to the mineral content. These characteristics together help in distinguishing between different types of igneous rocks, such as basalt and granite.
Which 2 groups is broken down into smaller groups by grain size?
Sedimentary rocks and igneous rocks can be broken down into smaller groups based on grain size. In sedimentary rocks, grain size categories include clay, silt, sand, and gravel. In igneous rocks, grain size categories include fine-grained, medium-grained, and coarse-grained.
How can you determine if a igneous rock has had an intrusive or extrusive origin?
== Grain size. Most intrusive igneous rocks will have visible crystals. Crystals in most extrusive igneous rocks are not easily visible.
What are the three colors used in identifying igneous rocks?
yellow green and red
How are igneous rocks classified acording to their..?
Igneous rocks are classified by either being intrusive or extrusive, then mafic or felsic then they are classified by either fine grain or course grained textures.
Which property most useful for identify igneous rocks?
The most useful property for identifying igneous rocks is their mineral composition, particularly the presence and proportions of key minerals such as quartz, feldspar, and mica. Additionally, texture, which includes grain size and the relationship between crystals, can provide significant insights; for instance, a coarse-grained texture indicates slow cooling, typical of intrusive igneous rocks, while a fine-grained texture suggests rapid cooling, characteristic of extrusive igneous rocks. These features combined help distinguish different types of igneous rocks effectively.
What are the characteristics of rock and how do you define them?
Rocks are defined by their mineral composition, texture, and formation processes. They can be classified into three main types: igneous, sedimentary, and metamorphic, each with distinct characteristics. Igneous rocks form from cooled magma or lava, sedimentary rocks consist of accumulated sediments and organic materials, and metamorphic rocks arise from the alteration of existing rocks under heat and pressure. Additional characteristics include color, hardness, and grain size, which help in identifying and classifying rocks.
What distinguishing physical feature is used in identifying Igneous rocks?
Hardness of rock (by using mohr's scale)
How can you tell rocks apart?
Rocks can be classified based on their texture, color, mineral composition, and how they formed. Identifying features like grain size, layering, and crystal shape can help distinguish between different types of rocks such as sedimentary, igneous, and metamorphic. In addition, conducting simple tests like scratching with a nail or testing for fizzing with acid can further assist in identifying rock types.
When molten rocks cools what rocks form?
igneous rocks
Are igneous rocks strong?
Igneous rocks have a wide range of strengths depending on factors like mineral composition and cooling history. Some igneous rocks, like granite, can be very strong and durable, while others, like pumice, can be quite weak and easily crumble.
