Igneous Rock Forms when molten rock (magma/lava) cools and hardens Cools slowly beneath Earth’s...
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Transcript of Igneous Rock Forms when molten rock (magma/lava) cools and hardens Cools slowly beneath Earth’s...
![Page 1: Igneous Rock Forms when molten rock (magma/lava) cools and hardens Cools slowly beneath Earth’s surface = intrusive Cools rapidly on the surface = extrusive.](https://reader036.fdocuments.in/reader036/viewer/2022062301/56649f005503460f94c15b51/html5/thumbnails/1.jpg)
Igneous Rock• Forms when molten rock (magma/lava) cools and
hardens• Cools slowly beneath Earth’s surface = intrusive• Cools rapidly on the surface = extrusive• Intrusive rocks usually have large, visible grains• Extrusive rocks usually have small to no visible grains• Color is based on the amount of silica in the magma
![Page 2: Igneous Rock Forms when molten rock (magma/lava) cools and hardens Cools slowly beneath Earth’s surface = intrusive Cools rapidly on the surface = extrusive.](https://reader036.fdocuments.in/reader036/viewer/2022062301/56649f005503460f94c15b51/html5/thumbnails/2.jpg)
How Igneous Rocks are Formed
![Page 3: Igneous Rock Forms when molten rock (magma/lava) cools and hardens Cools slowly beneath Earth’s surface = intrusive Cools rapidly on the surface = extrusive.](https://reader036.fdocuments.in/reader036/viewer/2022062301/56649f005503460f94c15b51/html5/thumbnails/3.jpg)
Igneous Rocks
Intrusive Igneous Rocks Extrusive Igneous Rocks
![Page 4: Igneous Rock Forms when molten rock (magma/lava) cools and hardens Cools slowly beneath Earth’s surface = intrusive Cools rapidly on the surface = extrusive.](https://reader036.fdocuments.in/reader036/viewer/2022062301/56649f005503460f94c15b51/html5/thumbnails/4.jpg)
Sedimentary Rocks
• Forms from the compaction and cementation of rock pieces, mineral grains, or organic matter called sediments
• Can contain fossils• Sediments are formed through the process of
weathering and erosion of exposed rocks.• Strata are layers of rock, or sometimes soil
![Page 5: Igneous Rock Forms when molten rock (magma/lava) cools and hardens Cools slowly beneath Earth’s surface = intrusive Cools rapidly on the surface = extrusive.](https://reader036.fdocuments.in/reader036/viewer/2022062301/56649f005503460f94c15b51/html5/thumbnails/5.jpg)
3 kinds:–Clastic = made of mineral or rock pieces
(shale; conglomerate; sandstone; Breccia)–Organic = made from plant or animal
remains (coal; coquina; some limestones)–Chemical = made from dissolved minerals in
water (halite; other limestones)
![Page 6: Igneous Rock Forms when molten rock (magma/lava) cools and hardens Cools slowly beneath Earth’s surface = intrusive Cools rapidly on the surface = extrusive.](https://reader036.fdocuments.in/reader036/viewer/2022062301/56649f005503460f94c15b51/html5/thumbnails/6.jpg)
Sedimentary Rocks
![Page 7: Igneous Rock Forms when molten rock (magma/lava) cools and hardens Cools slowly beneath Earth’s surface = intrusive Cools rapidly on the surface = extrusive.](https://reader036.fdocuments.in/reader036/viewer/2022062301/56649f005503460f94c15b51/html5/thumbnails/7.jpg)
Metamorphic Rock
• Forms when rocks are changed into different kinds of rocks by great heat and pressure
• They are heated, squeezed, folded, or changed by contact with hot magma.
• 2 kinds:– foliated = grains are in bands– nonfoliated = no banding
![Page 8: Igneous Rock Forms when molten rock (magma/lava) cools and hardens Cools slowly beneath Earth’s surface = intrusive Cools rapidly on the surface = extrusive.](https://reader036.fdocuments.in/reader036/viewer/2022062301/56649f005503460f94c15b51/html5/thumbnails/8.jpg)
Metamorphic Rocks