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Virtual Rock Collection

Published on Mar 21, 2016

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1.

Digital Rock Collection

By: Brandon Gamez
Photo by Andreas-photography
2.

Igneous Rocks

  • Formed when lava cools.
Photo by elleneka102
3.

Basalt

  • Basalt is the most common igneous rock.
  • Made mostly of minerals.
Photo by jsj1771
4.

Gabbro

  • Has larger grains than basalt
  • Is also made of feldspar.
Photo by quinn.anya
5.

Pumice

  • Has tiny holes in the rock.
  • Rough and scratchy.
Photo by jsj1771
6.

Obsidian

  • Cools very quickly.
  • Forms sharp edges.
Photo by kevinzim
7.

Sedimentary Rocks

  • Are formed when sediments are put under great pressure.
Photo by Forest Service Southwestern Region
8.

Conglomerate

  • Formed from larger pieces of sediment.
  • Can be as big as boulders
Photo by njorthr
9.

Limestone

  • Fine grained
  • It is made mostly of calcite.
Photo by Paul Grand
10.

Sandstone

  • Size depends on grains size.
  • Mostly made of quartz.
Photo by Scott Ingram Photography
11.

Shale

  • Fine grained.
  • Very small grains.
Photo by Travis S.
12.

Metamorphic

  • Formed when great pressure and heat on a rock change it.
Photo by subarcticmike
13.

Schist

  • Has wavy Lines.
  • Splits easily into layers.
Photo by siccarpoint
14.

Gneiss

  • Bands of light rock.
  • Formed when schist is heated on pressure.
Photo by abmatic
15.

Quartz

  • Made form sandstone.
  • Is usually white.
Photo by thomasina

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