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Igneous Rock

Igneous rock is formed from cooled magma or lava. The magma turns solid as it cools, and eventually becomes rock. It is sometimes crystallized.

1,149 Questions

How does rising magma affect land with no hard rock above it?

Rising magma can create a volcanic eruption when it reaches the surface, leading to the formation of new land through lava flow and ash deposits. In some cases, the magma may solidify underground, forming intrusive igneous rock formations. This can also lead to uplifting or subsidence of the land surface depending on the pressure and volume of the magma.

Why does lava form a rock when lava is cool?

Lava cools and solidifies because it loses heat to its surroundings, transitioning from a liquid state to a solid state. The atoms and molecules in the lava arrange themselves into a crystalline structure as they cool, forming a solid rock. The specific type of rock that forms depends on the composition of the lava.

What is the darkest igneous rock?

The darkest igneous rock is basalt, which is usually dark black or dark gray in color. It forms from the rapid cooling of lava on the Earth's surface, resulting in its fine-grained texture and dark appearance.

What are facts about igneous?

.The oldest rock known today is the Igneous rock. .Igneous rock can be any colour..The word "Igneous" is a Greek word that means fire. Igneous rocks are formed by the cooling of molten rock, lava or magma. When magma solidifies in the earth they are intrusive, when lava cools outside the earth it is extrusive.

Why is granite good for kerbstones?

granite is a introusive igneouse rock. which means it was formed from magma.

granite is used to make:

bridges

buildings

paving streets with coblestones

curbstones

floors

counters

and sometimes outdoor garden statues

this is because granite is an extreamly hard rock and have a preaty color.

Why are some igneous rocks glassy?

because of the history that has been put into them such as a hawiian finding a rock and taking it home cleaning it and polishing it.

or there were items thron into a volcano before eruption such as dimonds then when the volcanos erupted the magma and items were mixed it a hardend together

Who are the top ten producers of quartz in the world?

The top ten producers of quartz in the world are China, United States, Russia, India, Brazil, Norway, Canada, Kazakhstan, Turkey, and Mexico. China is the largest producer, followed by the United States and Russia.

Does igneous rocks absorb water?

igneous rocks do absorb water because of all the pores ,cracks, and holes in them. The holes will absorb the water and the water will get trapped in the rock there for igneous rocks do absorb water.

Why is granite used for steps and roads?

Granite is used for steps and roads because it is extremely durable, resistant to weathering and abrasion, and can withstand heavy foot traffic and vehicles. Its natural beauty and versatility make it a popular choice for outdoor applications.

Is solid rock located deep in the mantle called magma?

No, solid rock located deep in the mantle is not called magma. Magma is molten rock that is found beneath the Earth's surface in the mantle and crust. Solid rock in the mantle is known as the lithosphere.

What type of rock is porous volcanic rock?

Porous volcanic rock is commonly classified as either pumice or scoria. Pumice is often lighter in color and has a very porous texture due to the presence of numerous gas bubbles, while scoria is darker and similarly porous but is typically more dense than pumice. Both are formed from volcanic eruptions and can float on water.

What forms when molten rock erupts onto Earths surface?

When molten rock erupts onto Earth's surface, it forms lava flows and igneous rock formations. The type of igneous rock formed depends on the composition of the magma and the speed of cooling. Each eruption can create unique landforms like volcanoes, lava plateaus, and volcanic islands.

What is a light porous volcanic rock called?

Pumice is a light, porous volcanic rock that is commonly used in beauty and skincare products for exfoliation. It forms when volcanic lava rapidly cools and traps gases, creating its characteristic porous texture.

How do igneous rocks can become sedimentary metamorphic and igneous rocks?

Igneous rocks can transform into sedimentary rocks through weathering and erosion, which breaks down the igneous rock into sediments that are then compacted and cemented together. Igneous rocks can also undergo metamorphism due to heat and pressure, resulting in the formation of metamorphic rocks. Igneous rocks can also melt and be recrystallized to form new igneous rocks through cooling and solidification.

What does magma have to do with igneous rocks?

Magma is molten rock beneath the Earth's surface. When magma cools and solidifies, it forms igneous rocks. The cooling process can occur either slowly beneath the surface (intrusive igneous rocks) or rapidly on the surface (extrusive igneous rocks).

What igneous rock that cooled very quickly and is considered a glass rock?

Obsidian is an igneous rock that forms from lava cooling extremely quickly, preventing the formation of crystals. It is often referred to as a natural glass due to its lack of crystal structure.

Example of a coarse grained igneous rock?

Granite is an example of a coarse-grained igneous rock. It forms deep within the Earth's crust and is composed of large mineral grains visible to the naked eye. Granite is often used in building materials due to its durability and aesthetic appeal.

What is the ocean of molten rock on which the continents float called?

The ocean of molten rock beneath Earth's crust is called the mantle. The movement of the molten rock in the mantle is responsible for driving the motion of tectonic plates, which are like giant puzzle pieces that make up Earth's surface.

Is obsidian heavy or light?

Obsidian is considered to be relatively heavy due to its density compared to other types of rock. Its weight is attributed to its composition, which includes various minerals and volcanic glass.

Does intrusive rock cool fast or slow from magma?

Intrusive rock cools slowly from magma underground, allowing large mineral crystals to form. This slow cooling process is why intrusive rocks, such as granite and diorite, have a coarse-grained texture.

Is chalk a type of igneous rock?

limestone or could be gypsum Could be chalk. Dip it in vinegar. If it fizzes, it might be a sedimentary carbonate rock like limestone or chalk. There is always a possibility it is another kind of sedimentary rock or possibly an extrusive igneous one. Testing is needed to be sure.

The center of the earth is made of molten rock true or false?

True. The center of the Earth is believed to be primarily composed of molten iron and nickel, forming the outer core. The inner core is solid due to high pressure despite its extremely high temperature.

Where can Alternating parallel bands of normal and reversed magnetic polarity are found in the basaltic bedrock on either side of the?

These alternating parallel bands of normal and reversed magnetic polarity are found in the basaltic bedrock on either side of mid-ocean ridges, where new oceanic crust is formed through seafloor spreading. This pattern is a result of the Earth's magnetic field periodically reversing over geological timescales, leaving a record of these reversals in the oceanic crust as it solidifies.

Is dunite intrusive or extrusive?

Dunite is an intrusive igneous rock that forms from the cooling and solidification of magma beneath the Earth's surface. It is primarily composed of olivine mineral and is typically found in plutonic environments.