Why Can Two Igneous Rocks Have The Same Minerals But Different Names??

Why Can Two Igneous Rocks Have The Same Minerals But Different Names??

An igneous rock is classified on the basis of its mineral composition and the size of its mineral crystals. A rock formed from magma can have the same composition as a rock formed from lava. The rocks though will have different names because the sizes of their crystals will be very different.

Why do some igneous rocks contain the same minerals but have different physical characteristics?

Once magma has formed inside the earth its composition may be modified. Minerals can grow from the magma and separate from it changing the chemistry of the remaining liquid. … Magma can solidify into igneous rock in several different ways each way resulting in a different igneous texture.

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Can 2 igneous rocks have the same mineral composition but be different rocks?

Yes it is possible for two igneous rocks to have the same mineral composition but be different rocks.

Is it possible for two different types of igneous rocks to have the same composition and same texture explain your answer?

No if two rocks have the same composition then they are the intrusive and extrusive equivalents of one another. Thus they cannot have the same textures. Compare and contrast the two types of sedimentary rocks and give at least two examples of each type.

Which two igneous rocks have the same minerals but different textures diorite and?

Texture indicates how a rock cooled. Igneous rocks are categorized in pairs. The two rocks in a pair have the same composition but different textures: gabbro-basalt diorite-andesite and granite-rhyolite.

How can rocks be alike and different?

It is important that your students begin to understand that rocks are made of minerals. Different rocks have different characteristics because of their minerals the ways in which the rocks were formed and the processes that acted on the rocks since they were formed.

What determines the mineral composition of an igneous rock?

In addition to texture igneous rocks may are classified according to their chemical composition. The most general classification is based on the relative abundance in a rock of felsic (feldspar and silica-quartz) minerals vs mafic (magnesium and ferrum or iron) minerals.

How can 2 different rocks have the same mineral composition?

An igneous rock is classified on the basis of its mineral composition and the size of its mineral crystals. A rock formed from magma can have the same composition as a rock formed from lava. The rocks though will have different names because the sizes of their crystals will be very different.

Can two minerals be the same if they have different chemical composition?

It is perfectly possible to have two different minerals with exactly the same formula but different crystal structures. One commonly used example of this are the minerals diamond and graphite. … Two minerals having the same formula but different molecular structures are known as polymorphs.

Which pair of igneous rocks has the same composition?

All of the above are involved. Felsic intermediate and mafic igneous rock all are dominantly made up of ___________ minerals.

Can different types of rocks be made of the same minerals?

Rocks are identified primarily by the minerals they contain and by their texture. Each type of rock has a distinctive set of minerals. A rock may be made of grains of all one mineral type such as quartzite. Much more commonly rocks are made of a mixture of different minerals.

What are the two reasons that sedimentary rocks contain fossils but igneous rocks do not?

Earth contains three types of rocks: metamorphic igneous and sedimentary. With rare exceptions metamorphic and igneous rocks undergo too much heat and pressure to preserve fossils. So most fossils are found in sedimentary rocks where gentler pressure and lower temperature allows preservation of past life-forms.

How are rocks and minerals related?

A mineral is a naturally occurring inorganic element or compound having an orderly internal structure and characteristic chemical composition crystal form and physical properties. … A rock is an aggregate of one or more minerals or a body of undifferentiated mineral matter.

Which igneous rocks have the same composition but differ in their texture?

Igneous rocks are categorized in pairs. The two rocks in a pair have the same composition but different textures: gabbro-basalt diorite-andesite and granite-rhyolite.

What is the difference between an igneous rock with a glassy texture and a fine texture What causes this?

while igneous rock with a glassy texture is formed of rapid cooling of lava precisely due to quenching in water. while the igneous rock with a fine texture have an orderly arrangement of the atoms in the crystal and the crystals formed are too small that it cannot be seen by unaided eyes.

What is the texture of an igneous rock referring to quizlet?

Igneous rocks are classified by texture (the size of mineral grains and/or distribution of grain sizes) and composition (the types of minerals present).

What are the similarities and differences of rocks and minerals?

Comparison chart
Minerals Rocks
color color is usually the same color is not the same
Nutritional requirement for the human body Only some minerals are required by the human body for nutrition. little to none
shape usually have a shape no definite shape
fossils no fossils some have fossils

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How do minerals differ from rocks provide example of each?

A mineral is a pure substance with a specific composition and structure while a rock is typically a mixture of several different minerals (although a few types of rock may include only one type of mineral). Examples of minerals are feldspar quartz mica halite calcite and amphibole.

How do rocks differ from minerals quizlet?

How do rocks differ from minerals? Rocks are any solid mass made up of a of mineral or mineral-like matter that occur naturally as part of our planet. Unlike minerals which are made up of one specific type of material.

What can igneous rock different from other?

Igneous rocks can have many different compositions depending on the magma they cool from. They can also look different based on their cooling conditions. … If lava cools almost instantly the rocks that form are glassy with no individual crystals like obsidian. There are many other kinds of extrusive igneous rocks.

What is the difference between to two types of igneous rocks?

Intrusive or plutonic igneous rock forms when magma is trapped deep inside the Earth. … Intrusive rocks have a coarse grained texture. Extrusive Igneous Rocks: Extrusive or volcanic igneous rock is produced when magma exits and cools above (or very near) the Earth’s surface.

Which of the following distinguishes igneous rocks from other rock types?

Igneous rocks can be distinguished from sedimentary rocks by the lack of beds lack of fossils and lack of rounded grains in igneous rocks and the presence of igneous textures.

Can two different minerals have the same chemical formula but different crystal structures they are said to be?

Two minerals that have the same chemical composition but different crystal lattice structures are called polymorphs.

Why do different minerals have different properties?

A mineral must be a naturally occuring inorganic solid solid with a crystal structure and a definite chemical composition. … Each mineral has its own properties because each mineral has a definite chemical composition.

How do minerals differ from each other?

A mineral can be made of an element or a compound. Its chemical composition is different from other minerals. Each type of mineral has physical properties that differ from others. These properties include crystal structure hardness density and color.

What has the same mineral composition as rhyolite?

For example a felsic intrusive rock is called granite whereas a felsic extrusive rock is called rhyolite. Granite and rhyolite have the same mineral composition but their grain size gives each a distinct appearance.

Which of the following minerals is the most abundant mineral in ultramafic rocks?

The more important primary mafic minerals are olivine pyroxene hornblende mica garnet and opaque ores the most abundant secondary or metamorphic minerals are serpentine chlorite amphibole epidote and magnetite. The principal primary minerals occur in almost all proportions and monomineralic rocks are common.

What is the difference between mafic and ultramafic rocks?

is that ultramafic is (geology) describing igneous rocks that contain magnesium and iron and only a very small amount of silica such as are found in the earth’s mantle while mafic is (geology) describing rocks such as silicate minerals magmas and volcanic and intrusive igneous rocks which contain relatively high …

How are igneous and metamorphic rocks different?

Igneous rocks are formed when magma (or molten rocks) have cooled down and solidified. Sedimentary rocks are formed by the accumulation of other eroded substances while Metamorphic rocks are formed when rocks change their original shape and form due to intense heat or pressure. 2.

How are igneous and sedimentary rocks similar?

One similarity between igneous rock and sedimentary rock is that they both have smooth crystal. Sedimentary rocks are formed from compaction and cementation.

Identifying Igneous Rocks

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