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Fine-grained extrusive rocks primarily include volcanic rocks that solidify quickly from lava at or near the Earth's surface, resulting in small crystals. Common examples are basalt, rhyolite, and andesite. These rocks typically exhibit a smooth texture due to their rapid cooling, which prevents the formation of large mineral grains. Additionally, they may contain volcanic glass, such as obsidian, which forms when lava cools extremely quickly.
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What is the crystal size for extrusive igneous rocks?
Fine grained
Are in intrusive rocks fine grained?
No, intrusive rocks are typically coarse-grained because they form from magma that cools slowly beneath the Earth's surface, allowing larger crystals to develop. In contrast, extrusive rocks, which form from lava that cools quickly on the surface, are usually fine-grained. Thus, the grain size is a key distinguishing feature between intrusive and extrusive igneous rocks.
Do metamorphic rock and igneous rock have fine grained and coarse grained?
Yes. Exactly, they do have both, fine grained and coarse grained rocks.
Why fine grained rock weather faster?
Fine-grained rocks weather faster than coarse-grained rocks primarily due to their larger surface area relative to their volume. This increased surface area allows for more extensive exposure to weathering agents such as water, air, and biological activity. Additionally, fine-grained rocks often have more easily accessible minerals that can be chemically altered or dissolved, further accelerating the weathering process. As a result, fine-grained rocks tend to break down more rapidly than their coarser counterparts.
Is shale fine-grained or coarse-grained?
shale is fine grained
Which the following is a fine grained light colored extrusive igneous rock?
fine grained extrusive rocks can contain Potassium and Plagioclase Feldspar, Quartz, Biotite, Amphibole, Pyroxene and Olivine. these are all the choices for every igneous rocks
How do fine- grained igneous rocks from?
extrusive igneous rocks =/
Are extrusive rocks finely grained?
Yes extrusive rocks are fine grained because they cool down at a faster rate.
What are the properties of extrusive rock?
Extrusive rocks are formed from magma that cools quickly on the Earth's surface, resulting in small or no crystals. They typically have a fine-grained texture and may contain gas bubbles. Examples of extrusive rocks include basalt and rhyolite.
What grain type is found in extrusive igneous rocks?
Extrusive igneous rocks are usually fine grained.
Fine-grained extrusive rocks include all of the following EXCEPT . a. granite c. basalt b. scoria d. pumice?
Fine-grained extrusive rocks include basalt, scoria, and pumice, as they form from the rapid cooling of lava at the Earth's surface. However, granite is not a fine-grained extrusive rock; it is a coarse-grained intrusive igneous rock that forms from the slow cooling of magma beneath the Earth's surface. Therefore, the correct answer is a. granite.
What is the crystal size for extrusive igneous rocks?
Fine grained
Are river rocks porous?
No. It is a fine grained extrusive volcanic rock that is light in color. It is usually not porous.
Which igneous rocks are fine grained to due to fast cooling?
Extrusive igneous rocks are fine grained due to fast cooling. They cool at a faster rate than most igneous rocks.
What are types of extrusive igneous rocks?
Extrusive igneous rocks are igneous rocks that form above earth's surface. They are usually fine-grained due to the rate in which they cool.
What are types of extrusive rock?
Extrusive igneous rocks are igneous rocks that form above earth's surface. They are usually fine-grained due to the rate in which they cool.
How does extrusive differ from intrusive?
Extrusive rocks form from lava cooling on the Earth's surface, leading to rapid cooling and fine-grained texture. Intrusive rocks form from magma cooling beneath the surface, resulting in slower cooling and coarse-grained texture. This difference in cooling rates gives extrusive rocks their characteristic fine-grained appearance and intrusive rocks their coarse-grained appearance.
