0
What else can I help you with?
What is a factor that controls grain size in igneous rock?
It depends on if it is intrusive or extrusive. If it is an intrusive rock, it is formed when magma hardens under the earth and has a larger grain size. If it is an extrusive rock, it is formed when lava hardens on the earth's surface and has a smaller grain size.
What is the grain size of an extrusive igneous?
The grain size of an extrusive igneous rock is typically fine-grained to aphanitic, meaning the individual mineral grains are not visible to the naked eye. This rapid cooling at the Earth's surface prevents large crystals from forming, resulting in a fine texture.
How is basalt different from gabbro?
Basalt and gabbro are both igneous rocks, with major differences in grain size and where they form. Basalt has fine-grained crystals and forms from lava flows on the Earth's surface, while gabbro has coarse-grained crystals and forms from magma cooling beneath the Earth's surface.
What sedimetary rock has the smallest grain size?
Shale is a sedimentary rock that typically has the smallest grain size due to its fine-grained and compacted nature.
Does the rocks pigments give the rock its texture?
No, the texture of a rock is determined by its mineral composition, grain size, and how the rock formed (igneous, sedimentary, or metamorphic). Pigments refer to the coloration of a rock, which can be caused by the presence of specific minerals or impurities. Texture and pigmentation are separate characteristics of rocks.
What is a factor that controls grain size in igneous rock?
It depends on if it is intrusive or extrusive. If it is an intrusive rock, it is formed when magma hardens under the earth and has a larger grain size. If it is an extrusive rock, it is formed when lava hardens on the earth's surface and has a smaller grain size.
What does phaneritic mean?
Phaneritic refers to igneous rock grain size,which is visible with the naked eye.
What is a factor that controls grain size in igneos rocks?
Crystal size in igneous rocks is controlled by the rate of cooling whereby the slower the rate, the larger the size of crystal.
What determines the mineral grain size in an igneous rock?
The rate of cooling of the magma primarily determines the mineral grain size in an igneous rock. Rapid cooling results in fine-grained rocks, while slow cooling allows for the formation of coarse-grained rocks. Additionally, the composition of the magma and the presence of nucleation sites can also influence the final grain size.
Does grain size mean anything when identifying igneous rocks?
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.
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 is the grain size of an extrusive igneous?
The grain size of an extrusive igneous rock is typically fine-grained to aphanitic, meaning the individual mineral grains are not visible to the naked eye. This rapid cooling at the Earth's surface prevents large crystals from forming, resulting in a fine texture.
What size of rock texture refers to igneous rock?
The size of the mineral crystals in an igneous rock determines the rock's texture.
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 grain size of a fine grained igneous rock?
The individual grains (crystals) in quickly cooled magma are described as aphanitic--not visible without magnification.
What does grain size tell you about the orgin and cooling time of an igneous rock?
The larger the crystals, the more time it had to cool because the crystals had more time to grow
How is basalt different from gabbro?
Basalt and gabbro are both igneous rocks, with major differences in grain size and where they form. Basalt has fine-grained crystals and forms from lava flows on the Earth's surface, while gabbro has coarse-grained crystals and forms from magma cooling beneath the Earth's surface.
