Geology formed by congealing rapidly or slowly from a molten state.

a rock derived from fresh melt material (primary source material). i.e.. those rocks formed at volcanoes as lava flows and those injected into the crust such as granites.

Igneous is one of three types of rock. Igneous rock forms when magma, molten rock material within the earth, forces its way to the surface and cools.

Rock that was formed in a molten state or by fire, such as volcanic rock.

A rock which originated as magma at depth in or below the earth's crust.

rock - a rock formed by the solidification of magma

Used to describe rock formed under conditions of intense heat or produced by the solidification of volcanic magma on or below the Earth's surface.

one of the three types of rock that make up the earth's crust; this type of rock is formed when magma crystalizes after cooling. Granite and basalt are examples of igneous rocks.

(ig'-ne-ous) A rock or mineral that formed through the crystallization or solidified of molten or partly molten magma (molten rock). Igneous is applied to processes leading to, related to, or resulting from the formation of such rocks. Igneous rocks are one of the three main classes of rocks, the others being metamorphic and sedimentary.

Rock formed by volcanic activities.

(ig' nee us) - one of the three basic types of rock; formed from the solidification of magma.

A type of rock resulting from the solidification of magma. Many of the characteristics of igneous rocks are a result of their having been in a liquid (molten) state at one time. Back

Most igneous rocks have crystallised (solidified) from a magma (liquid) state and are either pushed out on the surface as volcanoes (extrusive) or pushed into the rocks forming the earth?s crust (intrusive).

rock formed by solidification from a molten or partially molten state (i.e. granite, basalt).

Deep within the earth’s inferno is a stew of molten rock and gases, called magma. As magma wells up within the earth, intense pressure forces the liquid rock toward the earth’s surface. It is referred to as lava when it breaks through the surface. Lava slowly cools forming igneous rocks, and within these rocks and gas-bubble spaces, interlocking crystals grow. The minerals present, the cooling time and the environment will all play a role in the way these crystals form. Examples of gemstones found in igneous rock: diamonds, topaz, kunzite and spinel.

Rock formed by cooling and solidification of molten rock, usually associated with volcanoes.

Rocks formed from melts in the Earth's crust. eg. Granite, gabbro or basalt.

One of the three main classifications of rock (igneous, sedimentary and metamorphic), solidified from molten state, as granite or lava.

A rock formed by the crystallization of a lava or magma K-Ar and U-Th dating techniques: determines a relative date of formation based upon the rate of radioactive decay of Potassium-Argon or Uranium-Thorium.

Igneous is a term used for solidified magma. It is also a term used for describing the processes related to the formation of igneous rocks.

One of the three basic categories into which rocks can be classified, of which the other two are sedimentary and metamorphic. Igneous rocks are formed by the cooling of molten rock, called magma.

produced under conditions involving intense heat; "igneous rock is rock formed by solidification from a molten state; especially from molten magma"; "igneous fusion is fusion by heat alone"; "pyrogenic strata"

Formed from originally-molten materials. Two main types of rocks generated this way are extrusive ( volcanic) and intrusive ( plutonic).

A rock that crystallized from hot, fluid rock material either below or at the earth's surface. Igneous rocks consist of interlocking mineral crystals.

Rock formed by solidification of molten or once molten material.

Rocks resulting from the crystallisation of a molten magma, either intrusive or volcanic.

It is one of the three main groups of rocks on the Earth. They have crystalline textures and appears to have consolidated from a silicate melt (magma).

Rocks solidified from molten magma at or below the surface of the Earth.

Subject: Geology A rock formed by cooling and consolidation of magma. Plutonic igneous rocks cool and crystallize slowly under the ground; volcanic igneous rocks cool and crystallize more quickly, at the surface. Plutonic rocks are generally coarser-grained than volcanic rocks, even if they are chemically similar. Reference : Skinner B.J., S.C.Porter & J.Park (2004), DYNAMIC EARTH, 5th edition, Jon Wiley & Sons. [ Pics List

(geology): A rock which forms by the deposition of magma or lava, usually as deep intrusions into rock layers but occasionally on the surface as volcanism. Granite is the commonest intrusive igneous rock. The Basalt capping on the Drakensberg is formed from a series of surface lava flows totalling 1.5 km thick. The other major rock types are sedimentary (deposited by wind and water) and metamorphic (a preexisting rock which has been transformed by high pressure and temperatures or by chemicals).

rocks which have been formed from molten magma either at or beneath the Earth's surface; from Latin igneus 'fiery', from ignis 'fire'.

Of volcanic origin.

Igneous rocks are formed by the solidification of molten magma. If the cooling takes place deep within the earth the rocks are coarse-grained, and are often termed intrusive or plutonic. If the cooling takes place at the surface the rocks are fine-grained and are often termed extrusive or volcanic.

One of the three main classes of rock (igneous, sedimentary, and metamorphic) solidified from a molten material or magma. It solidifies as it pushes its way from the molten core of the earth to the surface. Granite is one of the most common igneous rocks used in construction. Example: Granite Boulders

Relating to, resulting from, or suggestive of the intrusion or extrusion of magma or volcanic activity.

formed from melted or partially molten rock

One of three great classes of rock, igneous, sedimentary and metamorphic; solidified from molten state, as granite.

Resulting from the action of heat within the earth, usually accompanied by fusion; of rocks, formed by solidification of a molten magma.

Rocks formed by hardening of hot, molten magma.

pertaining to intense heat or fire; as in rock formed by volcanic action on the earth's surface, or within it's crust..

Formed by solidification of magma (molten rock).

rocks formed by solidification from a molten or partially molten state. Can either be formed beneath the earth's surface (plutonic), or by volcanic activity (extrusive).

A rock which has formed by cooling from the molten. Igneous rocks include lavas and other products of volcanoes (eg. ash) as well as rocks which crystallise at great depth in the crust, such as granites or gabbros.

(ig´-ne-ous) Said of a rock or mineral that solidified from molten material, i.e. from a magma; also, applied to the processes related to the formation of such rocks. Igneous rocks constitute one of three main classes into which rocks are divided, the others being metamorphic and sedimentary. Etymol: Latin ignis, "fire."

a rock type that is formed from the cooling and solidification of molten material such as magma or lava. Igneous rocks can be intrusive (e.g., granite plutons) or extrusive (e.g., volcanic lava flows).

Solidified from a molten state.

igneous rocks are new rocks, formed when hot magma rises up from inside the Earth and solidifies. Intrusive igneous rocks do not reach the surface, but form bodies of rock within the crust. Granite is an intrusive igneous rock. Extrusive igneous rocks are formed when the magma breaks through the crust and erupts on to the surface of the Earth. Once magma has reached the surface of the Earth it becomes known as lava - these rocks, such as basalt, can form volcanoes.

(adj) Rock formed by cooling and solidification of molten magma.

types of rocks formed by the solidification from a molten or liquid state - BACK

Rocks formed by the cooling and solidifying of magma.

or eruptive rock: rock deriving from magma consolidation; comprise plutonic rocks and volcanic rocks.

origin from fire (volcanic activity) Obsidian

type of rock that is formed by the solidification and crystallization of cooling magma

Rock that solidified from molten or partly molten material (i.e., magma). One of the three principal rock types, along with sedimentary* and metamorphic*.

Rock or mineral that solidified from molten or partly molten material.

Rock formed by cooled and hardened magma within the crust or lava on the surface.

produced by solidification from a molten state. Granite is an igneous rock. [AHDOS

Any rock solidified from molten or partly molten material. BWCA basalt, gabbro, and granite are of igneous origin.

Formed from the cooling and crystallization of a magma. Igneous rocks can be extrusive, meaning that they cooled on or very near the earth's surface, or intrusive, meaning that they cooled below the earth's surface.

Adjectival description of molten lava or basalt rock that has solidified.