the size of crystals in extrusive roks
Extrusive igneous rocks have very small crystal grains.
In extrusive igneous rocks, the crystals are typically very small or even microscopic due to the rapid cooling of magma when it erupts at the Earth's surface. This rapid cooling does not allow large crystals to form, resulting in a fine-grained texture. Some extrusive rocks may even appear glassy, with no discernible crystal structure at all.
it depends on if it is intrusive or extrusive (intrusive is below the earth and extrusive is at or above the earth) intrusive has a bigger crystal because it takes time to cool down.
Intrusive rock crystal size refers to the dimensions of crystals that form within igneous rocks as they cool slowly beneath the Earth's surface. These crystals tend to be larger than those found in extrusive rocks, which cool quickly on the surface. The size can vary significantly depending on factors such as the cooling rate, mineral composition, and the environment of crystallization. Typically, intrusive rocks like granite exhibit larger, well-formed crystals compared to their extrusive counterparts.
Minerals formed in intrusive rock cool more slowly than extrusive rock, which is closer to the surface. The longer cooling period allows more time for crystal formation.
What is the effect of location on crystal size? Label the location of intrusive and extrusive igneous rocks on the diagram below. Then, illustrate the crystal size of the rock formed at that location in the appropriate callout circles.
Fine grained
because the crystal in the rock is very small
Extrusive igneous rocks have very small crystal grains.
Lava is extrusive, meaning it forms on the Earth's surface as a result of volcanic activity. It cools rapidly and solidifies quickly into volcanic rock, such as basalt or obsidian. Intrusive rock, on the other hand, forms below the Earth's surface from magma that cools slowly.
In extrusive igneous rocks, the crystals are typically very small or even microscopic due to the rapid cooling of magma when it erupts at the Earth's surface. This rapid cooling does not allow large crystals to form, resulting in a fine-grained texture. Some extrusive rocks may even appear glassy, with no discernible crystal structure at all.
Obsidian is an extrusive rock that is a naturally occurring volcanic glass. It occurs when lava extrudes from a quickly cooling volcano, causing little crystal growth.
it depends on if it is intrusive or extrusive (intrusive is below the earth and extrusive is at or above the earth) intrusive has a bigger crystal because it takes time to cool down.
Intrusive rock crystal size refers to the dimensions of crystals that form within igneous rocks as they cool slowly beneath the Earth's surface. These crystals tend to be larger than those found in extrusive rocks, which cool quickly on the surface. The size can vary significantly depending on factors such as the cooling rate, mineral composition, and the environment of crystallization. Typically, intrusive rocks like granite exhibit larger, well-formed crystals compared to their extrusive counterparts.
Small crystal grains form when molten rock cools quickly. In an extrusive igneous rock, it's referred to as aphanitic texture.
by the size of the crystals, big crystals intrusive, small crystals extrusive
The crystal growth of intrusive igneous is substantially more so than extrusive igneous. Magma cools quicker on the earth's surface, extrusive igneous formed, as opposed to below the crust, intrusive. Therefore the longer it takes to cool the magma, the more the crystal growth.