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Extrusive igneous rock structures: Lava flow or plateau, Volcano (many types), Crater, Caldera, Fissure.

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Yazmin Sawayn

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Q: Identify four extrusive igneous rock structure?
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What kind of rocks make up make up of the igneous rock Where can you find such rocks?

Igneous is derived from the Latin word for fire (ignis), which is very appropriate since igneous rock can be created by volcanic action. It is the oldest form of rock and can be found where ever the earth's crust has been opened by volcanoes or earthquakes, allowing molten rock to seep to the surface. (Think: Islands!) Four types of igneous rock exist: 1. Obsidian: extrusive (forced to the surface) igneous rock that is actually glass and not minerals. Sharp edges, smooth surface. 2. Pumice: another extrusive igneous rock but, unlike obsidian, this volcanic rock was pitted by millions of tiny air bubbles. It, too, is glass and not minerals... and it can float! 3. Granite: very hard igneous rock formed deep within the earth and composed of feldspar and quartz. This is intrusive igneous rock because it is formed below the surface of the earth. 4. Scoria: extrusive, glass, with a pitted surface much like pumice. Scoria is more dense and has a darker color with much larger pits.


Identify four actions common to all types of structures during alarm red?

keep structure doors closedkeep personnel away from the exterior structure wallsperform SABCmaintain accountability of structure occupants


State four changes which extrusive volcanic feature may undergo overtime.?

melting,freezing,evaporation and boiling melting


What are four igneous rocks?

The four I know of are: gabbro, basalt, peridotite, and dolerite.


Sentence for igneous rock?

Even hard igneous rocks get weathered away eventually over millions of years to form sand grains.To the west of the twin towers, 14 rock groins were built using large blocks of hard, mainly igneous, rock.Igneous rock formed deep within the earth.Igneous complex had four phases, acid, basic, acid, basic.


What are four Mafic Igneous rocks?

The four I know of are: gabbro, basalt, peridotite, and dolerite.


What are four of intrusive rock bodies?

Igneous,sedimentry and metamorphic


How many syllables are in Identify?

The word identify has four syllables.


What are four kinds of intrusive rock bodies?

Igneous,sedimentry and metamorphic


Three of the four layers of this crust are igneous material?

oceanic crust


Name four types of rocks?

Igneous, sedimentary, metamorphic, and extraterrestrial.


What are four felsic igneous rocks?

vesicular rhyolite, rhyolite, granite, and pegmatite!