One of the three main types of rock on earth. Igneous rocks form when magma solidifies either on the surface of a planet or within the planet.
Applied to those rocks that have crystallized from a magma.
A rock formed by the solidification of a magma.
rocks that are formed from molten materials that come from the depths of the Earth. They are also referred to as magmatic rocks.
rock produced directly or indirectly from the solidification of molten magma (lava).
Rock that forms when hot molten rock (magma or lava) cools and freezes solid.
Rock formed when molten rock material (magma) wells up from the earth's interior, cools, and solidifies into rock masses. See rock cycle. Compare metamorphic rock, sedimentary rock.
a rock produced from molten rock called magma or lava
Rock produced by the cooling of magma within the earth (plutonic rock) or on the surface (volcanic rock).
A rock formed by the crystallization of magma or lava.
Rock that has been melted, cooled and become solid.
Rock formed by cooling and solidification of molten silicate minerals (magma). Igneous rocks include volcanic and plutonic rocks.
a rock mass formed by the solidification of material poured (when molten) into the earth's crust or onto its surface. Granite is an igneous rock.
Rocks formed by solidification of molten magma either beneath ( intrusive igneous rock) or at ( extrusive igneous rocks) the Earth's surface.
Rock formed from originally molten material (magma), can be either plutonic (cooling far below the earthâ€(tm)s surface) or volcanic (cooling on or near the earthâ€(tm)s surface). Minerals from these rocks often are used for calculating radiometric ages.
A rock that has formed by solidifying from a molten state.
rock formed by solidification from a molten or partially molten state (e.g. granite, basalt).
Igneous rock are formed from magma (melted rock) that has cooled and solidified, either within the Earth's crust or on the Earth's surface. Magma that solidify within the Earth's crust cools slowly and result in coarse-grained (large crystal) rock; for example, granite. Magma that solidify at or near the Earth's surface cools rapidly and result in fine-grained (small or no crystal) rock; for example, basalt and obsidian. Igneous rock is composed of mostly silicate minerals
rock formed by solidification of molten material (lava) or magma.
Rock formed when molten (melted) materials harden.
A rock that was once molten.
created when melted rock, called magma, gets trapped in pockets deep inside the Earth. When the magma cools and hardens it is known as igneous rock. Igneous rock is also formed when lava from volcanoes cools and hardens. Lava is just magma that is no longer underground, but has come out through a volcano. Granite is an example of igneous rock. Igneous rock is very hard so water does not break it up very easily. That is why low salinity is associated with an igneous ocean floor.
Rock produced by the cooling of molten magma, characteristically crystalline (e.g. granite).
One of the three principal groups of rock that make up the earthâ€™s surface; formed by the solidification of molten matter. See Sedimentary Rock and Metamorphic Rock
rock made of solidified molten material that made its way from the interior of the planet to the surface.
Rocks formed from erupted volcanic lava or solidified magma.
It is a type of rock from the volcanic origins. It can be glassy, crystalline or both.
rocks formed under great heat and pressure below the surface of the Earth
rock formed by the solidification of molten magma
A rock made from molten (melted) or partly molten material that has cooled and solidified.
rock of volcanic origin that forms from the cooling of magma. Includes basalts.
Rock formed from the crystallization of liquid magma.
Rock that has crystallized from molten material, known as magma.
Rock formed by volcanic action or intense heat, as rocks solidified from molten magma, which is liquid or molten rock deep in the earth. Granite and basalt are two types used in construction.
Rock that is formed by the cooling of lava or magma, inside or outside of the earthâ€™s crust.
rock which is magmatic in origin
a rock formed by the cooling of molten material.
Rocks formed from magma that has cooled and solidified either at the Earth's surface (eg basalt) or deep below the Earth's surface (eg granite).
formed by the solidification of hot, molten magma.
any rock solidified from molten or partly molten material.
Rock that originated as magma in the inside of the Earth.
Rock formed by change of the molten material called magma to the solid state.
Any rock produced by cooling from a molten state.
rock formed from the solidification of magma
rock formed from hot liquid magma or lava that cools and hardens, either below or above the Earth's surface
rocks which have solidified from a molten (liquid) magma.
rock formed when molten rock has cooled and solidified
Rock that has solidified from a molten state.
a rock that solidified from molten or partly molten material, i.e. magma.
formed by solidification, from a molten or partially molten state. Synonym: primary rock. Example: granite.
Rock which formed directly by crystallization from magma.
rock solidified from a high-temperature molten state; rock formed by cooling of magma
Rocks which were once molten (magma)
Rocks formed with high temperature, molten mineral matter cooled and solidified. ( FS People's Glossary of Eco Mgmt Terms)
When molten rock (lava) cools, igneous rock is formed. Jurassic Period A geological period of the Mesozoic Era, between about 200 and 135 million years ago. Dinosaurs flourished during this time. Kingdom The highest group of like-organisms in scientific classification. Dinosaurs are part of the Animal Kingdom.
a rock formed by crystallisation from a molten state.
Rocks that have cooled and solidified from molten rock ( magma).
A rock that has solidified from the molten or near molten state.
Rock formed by the cooling and consolidation of magma.
When molten rock cools, igneous rock is formed. INDEX FOSSILS Index fossils are commonly found fossils that are limited in time span. They help in dating other fossils. For example: trilobites were common during the Paleozoic, but not found before the Permian period, and ammonites were common during the Mesozoic Era, but not found after the Cretaceous period.
When molten rock cools, igneous rock is formed. Intrusive rocks are igneous rocks that have formed (and cooled slowly) beneath the surface of the Earth. Extrusive rocks are igneous rocks that have formed (and cooled more quickly) at the surface of the Earth (like obsidian). Some igneous rocks include granite, obsidian (volcanic glass), basalt, and andesite porphyry.
A rock formed by cooling of molten magma including basalt and granite.
Rock that has crystallised from a molten state (magma).
One of the three principal types of rock, along with sedimentary and metamorphic rock. Igneous rock is formed by the crystallization of molten materials, for instance, in a volcano or other setting where plate tectonicprocesses take place.
Igneous rocks are formed when rock (magma) cools and solidifies, with or without crystallisation, either below the surface as intrusive (plutonic) rocks or on the surface as extrusive (volcanic) rocks. This magma can be derived from partial melts of pre-existing rocks in either the Earth's mantle or crust. Typically, the melting is caused by one or more of the following processes -- an increase in temperature, a decrease in pressure, or a change in composition.