The Rock Cycle
http://imnh.isu.edu/digitalatlas/geo/basics/diagrams.htm
This is a picture of a rock cycle, and it shows you how rocks form. The rock cycle is a group of changes and events on the surface and inside Earth which slowly changes rock from one kind to another. Igneous rock can change into sedimentary rock or into metamorphic rock. Sedimentary rock can change into metamorphic rock or into igneous rock. Metamorphic rock can change into igneous or sedimentary rock. Erosion occurs and makes the rocks turn into different rocks. The three types of rocks are igneous rocks, sedimentary rocks, and metamorphic rocks.
This is a picture of a rock cycle, and it shows you how rocks form. The rock cycle is a group of changes and events on the surface and inside Earth which slowly changes rock from one kind to another. Igneous rock can change into sedimentary rock or into metamorphic rock. Sedimentary rock can change into metamorphic rock or into igneous rock. Metamorphic rock can change into igneous or sedimentary rock. Erosion occurs and makes the rocks turn into different rocks. The three types of rocks are igneous rocks, sedimentary rocks, and metamorphic rocks.
Igneous Rocks
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Igneous rock is any rock that forms from magma or lava. Most igneous rocks are made from mineral crystals. They are classified by their origin, mineral composition and texture. For the origin, geologists classify igneous rocks according to where they formed. The texture of an igneous rock depends on the size and the shape of its mineral crystals. Some igneous rocks are called pumice, basalt, granite, and obsidian.
Igneous rock is any rock that forms from magma or lava. Most igneous rocks are made from mineral crystals. They are classified by their origin, mineral composition and texture. For the origin, geologists classify igneous rocks according to where they formed. The texture of an igneous rock depends on the size and the shape of its mineral crystals. Some igneous rocks are called pumice, basalt, granite, and obsidian.
Pumice
One type of rock is called pumice , which is formed from lava that's full of gas. The lava is ejected and shot through the air during an eruption. As the lava hurtles through the air, it cools and the gases escape which leaves the rock with holes. Since pumice has a rough texture, it makes it useful for cleaning and polishing.
Basalt
http://lcc.ctc.edu/departments/natural_sciences/links/linksvolc.xtm
Basalt is a hard, dark-colored, fine-grained, igneous rock. Some basalt can sometimes be glassy. It usually forms from rapid cooling lava. Basalt is mostly used to be crushed for gravel in construction sites.
Basalt is a hard, dark-colored, fine-grained, igneous rock. Some basalt can sometimes be glassy. It usually forms from rapid cooling lava. Basalt is mostly used to be crushed for gravel in construction sites.
Sedimentary Rocks
http://www.rainbowresource.com/proddtl.php?id=023467
Sediment changes to sedimentary rock by four processes. This includes erosion, which happens when running water/ wind loosen and carry away small pieces of rock. Then, deposition occurs. This is the process where sediment settles out of the water/wind carrying it. Next, is compaction. This is the process where sediments are pressed together. Last, cementation is where dissolved minerals crystallize and glue particles together. Some examples of sedimentary rocks are called shale, sandstone and limestone.
Sediment changes to sedimentary rock by four processes. This includes erosion, which happens when running water/ wind loosen and carry away small pieces of rock. Then, deposition occurs. This is the process where sediment settles out of the water/wind carrying it. Next, is compaction. This is the process where sediments are pressed together. Last, cementation is where dissolved minerals crystallize and glue particles together. Some examples of sedimentary rocks are called shale, sandstone and limestone.
Types of Sedimentary Rocks
There are three main groups of sedimentary rock. This includes clastic rocks, organic rocks, and chemical rocks. A clastic rock is formed when rock fragments are squeezed together. Some clastic rocks are called shale and sandstone. Organic rock forms where the remains of plants and animals are deposited in thick layers. Some organic rocks are coal and limestone. Chemical rock is formed when minerals dissolved in water begin to precipitate out of solution and deposit at the base of the water body. One example of chemical rock would be limestone formed when calcite that's dissolved in underground water comes out of solution and then forms crystals.
Sandstone
http://photography.nationalgeographic.com/photography/photos/best-pod-exquisite-earth/sandstone-pedestal_pod_image.html
Sandstone forms from the sand on beaches, on the ocean floor, riverbeds, and in sand dunes. Sandstone is a clastic rock and forms from compaction and cementation of small particles of sand. It contains small holes because the cementation process doesn't fill all the spaces between the sand grains. Sandstone can absorb water through those holes. The texture is usually fine-grained.
Sandstone forms from the sand on beaches, on the ocean floor, riverbeds, and in sand dunes. Sandstone is a clastic rock and forms from compaction and cementation of small particles of sand. It contains small holes because the cementation process doesn't fill all the spaces between the sand grains. Sandstone can absorb water through those holes. The texture is usually fine-grained.
Metamorphic Rocks
http://www.dailykos.com/story/2013/02/02/1182389/-Dkos-Special-Series-Relevant-Geology-For-Armchair-Tours
A metamorphic rock is formed when pre-existing rocks are subjected to elevated temperatures or pressure. This causes the rock to recrystallize and to form a course grained rock. Metamorphic rocks can form from heat and pressure beneath Earth's surface. When rocks change into metamorphic rock, its appearance, crystal structure, texture, and mineral content change. It can form out of an igneous rock, sedimentary rock, or any other metamorphic rock. Geologists classify metamorphic rocks by the arrangement of the grains that make up the rock. Some examples of metamorphic rocks are slate, shale, marble,and quartzite.
A metamorphic rock is formed when pre-existing rocks are subjected to elevated temperatures or pressure. This causes the rock to recrystallize and to form a course grained rock. Metamorphic rocks can form from heat and pressure beneath Earth's surface. When rocks change into metamorphic rock, its appearance, crystal structure, texture, and mineral content change. It can form out of an igneous rock, sedimentary rock, or any other metamorphic rock. Geologists classify metamorphic rocks by the arrangement of the grains that make up the rock. Some examples of metamorphic rocks are slate, shale, marble,and quartzite.
Marble
http://www.minimegeology.com/home/mgeo/page_4
Marble usually forms when limestone is subjected to heat and pressure beneath Earth's surface. Marble can be easily polished. It can be used for many buildings and statues. For example, the Taj Mahal in Agra India was built in the 1600s, which was made from white marble.
Marble usually forms when limestone is subjected to heat and pressure beneath Earth's surface. Marble can be easily polished. It can be used for many buildings and statues. For example, the Taj Mahal in Agra India was built in the 1600s, which was made from white marble.
Slate
Slate is the most finest-grained foliated metamorphic rock. Foliated means that the grains are arranged in parallel layers or bands. Slate is formed from heat and pressure from the sedimentary rock called shale which turns the shale into slate. Slate is thicker and more tightly packed.
We hope you enjoyed this website and learned about different types of sedimentary, metamorphic and igneous rocks, and much more!
-NA