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What are sedimentary rock crystals?
In general, sedimentary rock crystals would be crystals that are found in sedimentary rocks. Normally they are calcite or quartz as they are the minerals most likely to cement sediments to form sedimentary rocks. There is a group of sedimentary rocks called evaporites that include crystals of salt, gypsum, sylvite, glauberite, thenardite, mirabilite and a few others. However, there is a tremendous variety of other minerals that can produce crystals in sedimentary rocks. Geodes from Indiana, Illinois, and Kentucky can have crystals of barite, millerite, sphalerite, galena, fluorite, and aragonite. In other areas of the planet crystals of azurite and malachite can be found in sedimentary rocks. There are many, many other types of crystals that have been found in sedimentary rocks.
What rocks result from heat and pressure melting into magma?
sedimentary rocks
Are rocks made from magma?
Some rock (igneous) is made from solidifying magma. Other rock is formed from different processes.
Does conglomerate have any crystals?
Well, Conglomerate is a sedimentary rock and sedimentary rocks are not crystalline in nature, but they do consist of mineral crystals such as Quartz.
Do rocks that cool slowly from magma contain more crystals?
No. They would contain fewer, but larger mineral crystals when compared to igneous rocks which have cooled quickly from lava or magma.
Do sedimentary rock form from crystals solidifying from magma?
No. Those are igneous rocks. Sedimentary rocks from from the acummulation and lithification of weathered material.
Why does lava cool into?
The minerals in magma form crystals when solidifying, giving igneous rocks their characteristic hardness.
How did the lava cool from hot lava to hard rock?
The minerals in magma form crystals when solidifying, giving igneous rocks their characteristic hardness.
How do rocks change from metamorphic or sedimentary rocks to igneous rocks?
By melting and then solidifying.
What are the steps to rock cycle?
A rock cycle starts off as magma. Then as the magma cools, crystals form, and eventually the magma solidify into igneous rocks. The process breaks down into sedimentary rocks. The processes change a pre-existing igneous or sedimentary rock into a new rock called metamorphic rocks, then it melts into magma and the process starts all over.
What are sedimentary rock crystals?
In general, sedimentary rock crystals would be crystals that are found in sedimentary rocks. Normally they are calcite or quartz as they are the minerals most likely to cement sediments to form sedimentary rocks. There is a group of sedimentary rocks called evaporites that include crystals of salt, gypsum, sylvite, glauberite, thenardite, mirabilite and a few others. However, there is a tremendous variety of other minerals that can produce crystals in sedimentary rocks. Geodes from Indiana, Illinois, and Kentucky can have crystals of barite, millerite, sphalerite, galena, fluorite, and aragonite. In other areas of the planet crystals of azurite and malachite can be found in sedimentary rocks. There are many, many other types of crystals that have been found in sedimentary rocks.
Do sedimentary rocks melt and become magma?
No. It's the Metamorphic rocks that melt and become magma.
Do sedimentary rocks have tiny crystals?
yes
What rocks result from heat and pressure melting into magma?
sedimentary rocks
Are rocks made from magma?
Some rock (igneous) is made from solidifying magma. Other rock is formed from different processes.
Why do some igneous rocks have larger crystals but other igneous rocks have crystals so small they have to be seen with a microscope?
Crystal size in igneous rock is dependent on the amount of time spent in cooling from magma or lava. More time means larger crystals. Rocks that have small crystals cooled quickly, so the minerals didn't have time to rearrange and form large crystals before the rock solidified. These small-crystalled rocks are described as aphanitic. Other rocks cooled slowly, so the minerals had time to rearrange and form large crystals before solidifying. These rocks are considered phaneritic. Some rocks cool slowly for a while, and then experience rapid cooling (such as magma that cools slowly inside a volcano, and then cools rapidly when the volcano erupts). Such rocks have large crystals surrounded by tiny crystals. Rocks that form this way are described as porphyritic.
What factor most influences the size of mineral crystals in igneous rocks?
The major factor is the amount of time the magma remains mostly liquid while cooling and solidifying. More time spent cooling produces larger crystals because of the free movement of a mineral's constituent isotopes in a somewhat liquid magma.
