Chemically, mafic rocks are enriched in iron, magnesium and calcium and typically dark in color. In contrast, the felsic rocks are typically light in color and enriched in aluminium and silicon along with potassium and sodium. The mafic rocks also typically have a higher density than felsic rocks.

What is the difference between mafic rocks and felsic rocks?

Either in describing rocks or lava, mafic means that the lava or rock has less silica while felsic implies that the lava or rock has the most silica. 6. Mafic rocks are darker in color than felsic rocks.

What is the difference between felsic and mafic rocks quizlet?

What is the difference between a felsic and mafic igneous rock? ... Felsic rocks are rich in Silicon, Sodium, and Potassium, while Mafic igneous rocks are rich in Iron, Magnesium, and Calcium. Felsic rocks are lighter in color, whereas Mafic rocks are darker in color.

What is the difference felsic and mafic magma?

Mafic magmas are low in silica and contain more dark, magnesium and iron rich mafic minerals, such as olivine and pyroxene. Felsic magmas are higher in silica and contain lighter colored minerals such as quartz and orthoclase feldspar. The higher the amount of silica in the magma, the higher is its viscosity.

Why do igneous rocks have different textures?

Explanation: The faster the magma cools that smaller the crystals that are formed. Some magma from which the igneous rocks is form come from different combinations of remelted igneous rocks, metamorphic rocks and sedimentary layers. ... The different sources of the melted material affects the textures of the igneous rocks.

Igneous Rocks-(Extrusive-Intrusive-Mafic-Felsic

32 related questions found

Which are definitions of mafic and felsic?

Mafic is a magma/rock that is rich in feldspar and silica (quartz), whereas felsic refers to that which is rich in Fe and Mg.

What is the differences between a plutonic intrusive igneous rock and a volcanic extrusive igneous rock?

Volcanic rocks are rocks formed when lava cools and solidifies on the earth's surface. Volcanic rocks are also known as 'extrusive igneous rocks' because they form from the 'extrusion,' or eruption, of lava from a volcano. ... Plutonic rocks are rocks formed when magma cools and solidifies below the earth's surface.

What is the difference between a plutonic igneous rock and a volcanic igneous rock?

Plutonic rocks are formed when magma cools and solidifies underground. Volcanic rocks are formed from lava that flows on the surface of the Earth and other planets and then cools and solidifies. The texture of an igneous rock depends on the size of the crystals in the rock.

What is the difference between mineralogy and crystallography?

2.1 Introduction. Mineralogy is the systematic study that deals with the characteristics of minerals. ... Crystallography studies crystal forms, i.e. forms in which the minerals crystallize, as well as their internal structure, relations and distribution of atoms, ions or ionic groups in the crystal lattice. 2.

How is felsic rock formed?

Felsic magma usually originates in the crust or by the shedding of mafic minerals as magma rises through the crust. ... Another way that igneous rock forms is by magma erupting explosively into the air and falling to earth in pieces known as pyroclastic material, also called tephra.

What does felsic stand for?

Felsic refers to silicate minerals, magma, and rocks which are enriched in the lighter elements such as silicon, oxygen, aluminium, sodium, and potassium. Felsic magma or lava is higher in viscosity than mafic magma/lava. Felsic rocks are usually light in color and have specific gravities less than 3.

What are the differences between Teutonic rocks and volcanic rocks?

Volcanic rocks are igneous rocks that are formed above the ground from the lava. Plutonic rocks are igneous rocks that are formed deep under the Earth's surface from the magma. ... The magma cools down slowly so these rocks are coarse-grained as large crystals could be formed before the magma solidifies.

What is the similar of volcanic rocks and plutonic rocks?

Volcanic and plutonic rocks are both igneous, meaning that they form from molten rock becoming solidified. They can also both be classified based on of their chemical and mineralogical composition. They also both form in geologically active zones such as subduction zones, rift valleys, and mid-oceanic ridges.

What are the differences between sedimentary and metamorphic rocks?

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.

How are intrusive and extrusive igneous rocks alike and different?

Extrusive rocks are formed on the surface of the Earth from lava, which is magma that has emerged from underground. Intrusive rocks are formed from magma that cools and solidifies within the crust of the planet. ... If lava cools almost instantly, the rocks that form are glassy with no individual crystals, like obsidian.

Can the same volcano produce volcanic rocks with different compositions?

Volcanoes produce different types of volcanic rocks. The creation of volcanic rocks depends on the type of eruption and the source and composition of the magma erupted. ... For example, basalt (a dark gray to black rock) contains more minerals of olivine and hornblende than andesite (a gray rock).

What is the difference between extrusive igneous rocks and intrusive igneous rocks quizlet?

The difference between intrusive and extrusive igneous is that, intrusive rock is one that forms when magma cools within Earth. Extrusive igneous rock is one that, forms when lava cools on Earths surface.

Which of the following minerals is common in both felsic and mafic igneous rocks?

What minerals is common in both felsic and mafic igneous rocks? Plagioclase Feldspar.

Which of the following rocks is categorized as a metamorphic rock?

Common metamorphic rocks include phyllite, schist, gneiss, quartzite and marble.

Is mafic or felsic more viscous?

Composition: he more felsic the lava (the more silica in the lava), the higher the viscosity because silica forms chains in the cooling lava even before it crystallizes. The more mafic the lava (the less silica in it), the lower the viscosity.

Why are mafic rocks dense than felsic?

Mafic vs Felsic

Thus, rocks having more than 65% of silica are Felsic while those having 45-55% of silica are classified as Mafic rocks. Mafic rocks are rich in iron and magnesium, whereas Felsic rocks are rich in silica and aluminum. Mafic rocks are denser and heavier than Felsic rocks.

What is a vesicular felsic rock called?

Porphyritic. A vesicular Felix rock is called a: Pumice.

What is volcanic rock called?

Volcanic rock (also called extrusive rock) is one type of magmatic rock (igneous rocks) and is the condensated product of extrusive magma after diagenesis and compaction, which differ greatly from sedimentary rocks in forming conditions, environments, and distribution. From: Unconventional Petroleum Geology, 2013.

How is still different from a dike?

1. Dykes (or dikes) are igneous rocks that intrude vertically (or across), while sills are the same type of rocks that cut horizontally (or along) in another land or rock form. 2. Dykes are discordant intrusions, while sills are concordant intrusions.