By: Nate Sorensen

What is a rock?

the solid mineral material forming part of the surface of the earth.
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Granite is a light-colored igneous rock with grains large enough to be visible with the unaided eye. It forms from the slow crystallization of magma below Earth's surface. Granite is composed mainly of quartz and feldspar with minor amounts of mica, amphiboles and other minerals. Granite is a non vesicular rock.
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Conglomerates often begins by being deposited as a sediment consisting mainly of pebble and cobble-size clasts. The finer-size sand and clay which fill the spaces between the larger clasts is often deposited later on top of the large clasts and then sifts down between them to fill the interstitial spaces. The deposition of a chemical cement then binds the sediment into a rock. conglomerate rocks are formed in rivers and on beaches. the composition varies due to the differences in surrounding rocks and minerals. the Grain size can not be specified because it differs throughout the rock.
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Marble is a metamorphic rock formed when limestone is exposed to high temperatures and pressures. Marble's texture can vary from smooth to coarse and its grain size can vary from large to small. Marble is a non-foliated metamorphic rock.
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Rock cycle

The rock cycle depicts how sedimentary, igneous, and metamorphic rocks are formed and how they can change.