Rock+Database

Formed from liquid magma, melted rock beneath Earth's surface. Crystals are randomly arranged and interlocking.
 * Igneous Rocks**

**Intrusive (formed below Earth's surface)** Medium- to coarse-grained crystalline rocks. Crystals are larger due to slow cooling under Earth's crust. The slower the rock cools, the larger the crystals. **Extrusive (formed at Earth's surface)** Fine-grained to glassy. This texture forms because cooling occurs quickly at Earth's surface. Magma that reaches the surface is called lava.
 * [[image:http://www.fossweb.com/modules3-6/EarthMaterials/activities/rockdatabase/igneous_rocks/images/granite_2.gif width="134" height="138" caption="Granite rock" link="http://www.fossweb.com/modules3-6/EarthMaterials/activities/rockdatabase/igneous_rocks/granite.html"]] || [[image:http://www.fossweb.com/modules3-6/EarthMaterials/activities/rockdatabase/igneous_rocks/images/gabbro_2.gif width="134" height="112" caption="Gabbro rock" link="http://www.fossweb.com/modules3-6/EarthMaterials/activities/rockdatabase/igneous_rocks/gabbro.html"]] ||
 * **Granite** || **Gabbro** ||
 * [[image:http://www.fossweb.com/modules3-6/EarthMaterials/activities/rockdatabase/igneous_rocks/images/basalt.gif width="145" height="132" caption="Basalt rock" link="http://www.fossweb.com/modules3-6/EarthMaterials/activities/rockdatabase/igneous_rocks/basalt.html"]] || [[image:http://www.fossweb.com/modules3-6/EarthMaterials/activities/rockdatabase/igneous_rocks/images/scoria.gif width="133" height="135" caption="Scoria rock" link="http://www.fossweb.com/modules3-6/EarthMaterials/activities/rockdatabase/igneous_rocks/scoria.html"]] ||
 * **Basalt** || **Scoria** ||
 * [[image:http://www.fossweb.com/modules3-6/EarthMaterials/activities/rockdatabase/igneous_rocks/images/pumice_ut.gif width="134" height="131" caption="Pumice rock" link="http://www.fossweb.com/modules3-6/EarthMaterials/activities/rockdatabase/igneous_rocks/pumice.html"]] || [[image:http://www.fossweb.com/modules3-6/EarthMaterials/activities/rockdatabase/igneous_rocks/images/obsidian.gif width="142" height="120" caption="Obsidian rock" link="http://www.fossweb.com/modules3-6/EarthMaterials/activities/rockdatabase/igneous_rocks/obsidian.html"]] ||
 * **Pumice** || **Obsidian** ||
 * [[image:http://www.fossweb.com/modules3-6/EarthMaterials/activities/rockdatabase/igneous_rocks/images/tuff.gif width="133" height="111" caption="Tuff Rock" link="http://www.fossweb.com/modules3-6/EarthMaterials/activities/rockdatabase/igneous_rocks/tuff.html"]] || [[image:http://www.fossweb.com/modules3-6/EarthMaterials/activities/rockdatabase/igneous_rocks/images/rhyolite.gif width="134" height="125" caption="Rhyolite rock" link="http://www.fossweb.com/modules3-6/EarthMaterials/activities/rockdatabase/igneous_rocks/rhyolite.html"]] ||
 * **Tuff** || **Rhyolite** ||
 * [[image:http://www.fossweb.com/modules3-6/EarthMaterials/activities/rockdatabase/igneous_rocks/images/serpentinite.gif width="134" height="119" caption="Serpentinite rock" link="http://www.fossweb.com/modules3-6/EarthMaterials/activities/rockdatabase/igneous_rocks/serpentinite.html"]] ||  ||
 * **Serpentinite** ||
 * [[image:http://www.fossweb.com/modules3-6/EarthMaterials/activities/rockdatabase/igneous_rocks/images/serpentinite.gif width="134" height="119" caption="Serpentinite rock" link="http://www.fossweb.com/modules3-6/EarthMaterials/activities/rockdatabase/igneous_rocks/serpentinite.html"]] ||  ||
 * **Serpentinite** ||
 * **Serpentinite** ||

Existing rocks that have been changed by heat or heat and pressure together. These processes occur very slowly. New minerals may form during metamorphism.
 * Metamorphic Rocks**<span style="FONT-FAMILY: Arial,Helvetica,Geneva,Swiss,SunSans-Regular">


 * [[image:http://www.fossweb.com/modules3-6/EarthMaterials/activities/rockdatabase/metamorphic_rocks/images/gneiss.gif width="170" height="123" caption="Gneiss Rock" link="http://www.fossweb.com/modules3-6/EarthMaterials/activities/rockdatabase/metamorphic_rocks/gneiss.html"]] || [[image:http://www.fossweb.com/modules3-6/EarthMaterials/activities/rockdatabase/metamorphic_rocks/images/schist.gif width="161" height="125" caption="Schist Rock" link="http://www.fossweb.com/modules3-6/EarthMaterials/activities/rockdatabase/metamorphic_rocks/schist.html"]] ||
 * <span style="FONT-FAMILY: Arial,Helvetica,Geneva,Swiss,SunSans-Regular">**Gneiss** || <span style="FONT-FAMILY: Arial,Helvetica,Geneva,Swiss,SunSans-Regular">**Schist** ||
 * [[image:http://www.fossweb.com/modules3-6/EarthMaterials/activities/rockdatabase/metamorphic_rocks/images/quartzite.gif width="118" height="123" caption="Quartzite Rock" link="http://www.fossweb.com/modules3-6/EarthMaterials/activities/rockdatabase/metamorphic_rocks/quartzite.html"]] || [[image:http://www.fossweb.com/modules3-6/EarthMaterials/activities/rockdatabase/metamorphic_rocks/images/marble.gif width="135" height="123" caption="Marble Rock" link="http://www.fossweb.com/modules3-6/EarthMaterials/activities/rockdatabase/metamorphic_rocks/marble.html"]] ||
 * <span style="FONT-FAMILY: Arial,Helvetica,Geneva,Swiss,SunSans-Regular">**Quartzite** || <span style="FONT-FAMILY: Arial,Helvetica,Geneva,Swiss,SunSans-Regular">**Marble** ||
 * [[image:http://www.fossweb.com/modules3-6/EarthMaterials/activities/rockdatabase/metamorphic_rocks/images/slate.gif width="154" height="127" caption="Serpentine Rock" link="http://www.fossweb.com/modules3-6/EarthMaterials/activities/rockdatabase/metamorphic_rocks/slate.html"]] ||  ||
 * <span style="FONT-FAMILY: Arial,Helvetica,Geneva,Swiss,SunSans-Regular">**Slate** ||  ||
 * <span style="FONT-FAMILY: Arial,Helvetica,Geneva,Swiss,SunSans-Regular"> ||  ||
 * <span style="FONT-FAMILY: Arial,Helvetica,Geneva,Swiss,SunSans-Regular">**Slate** ||  ||
 * <span style="FONT-FAMILY: Arial,Helvetica,Geneva,Swiss,SunSans-Regular"> ||  ||

<span style="font-family: Arial,Helvetica,Geneva,Swiss,SunSans-Regular">Composed of layers of broken rock fragments, seashells, and chemicals such as calcium carbonate.
 * Sedimentary Rocks**


 * [[image:http://www.fossweb.com/modules3-6/EarthMaterials/activities/rockdatabase/sedimentary_rocks/images/limestone.gif width="159" height="127" caption="Limestone Rock" link="http://www.fossweb.com/modules3-6/EarthMaterials/activities/rockdatabase/sedimentary_rocks/limestone.html"]] || [[image:http://www.fossweb.com/modules3-6/EarthMaterials/activities/rockdatabase/sedimentary_rocks/images/shale.gif width="158" height="137" caption="Shale Rock" link="http://www.fossweb.com/modules3-6/EarthMaterials/activities/rockdatabase/sedimentary_rocks/shale.html"]] ||
 * <span style="font-family: Arial,Helvetica,Geneva,Swiss,SunSans-Regular">**Limestone** || <span style="font-family: Arial,Helvetica,Geneva,Swiss,SunSans-Regular">**Shale** ||
 * [[image:http://www.fossweb.com/modules3-6/EarthMaterials/activities/rockdatabase/sedimentary_rocks/images/sandstone.gif width="166" height="127" caption="Sandstone Rock" link="http://www.fossweb.com/modules3-6/EarthMaterials/activities/rockdatabase/sedimentary_rocks/sandstone.html"]] || [[image:http://www.fossweb.com/modules3-6/EarthMaterials/activities/rockdatabase/sedimentary_rocks/images/quartz_conglomerate.gif width="134" height="132" caption="Conglomerate Rock" link="http://www.fossweb.com/modules3-6/EarthMaterials/activities/rockdatabase/sedimentary_rocks/conglomerate.html"]] ||
 * <span style="font-family: Arial,Helvetica,Geneva,Swiss,SunSans-Regular">**Sandstone** || <span style="font-family: Arial,Helvetica,Geneva,Swiss,SunSans-Regular">**Conglomerate** ||
 * [[image:http://www.fossweb.com/modules3-6/EarthMaterials/activities/rockdatabase/sedimentary_rocks/images/breccia.gif width="134" height="126" caption="Breccia Rock" link="http://www.fossweb.com/modules3-6/EarthMaterials/activities/rockdatabase/sedimentary_rocks/breccia.html"]] || [[image:http://www.fossweb.com/modules3-6/EarthMaterials/activities/rockdatabase/sedimentary_rocks/images/coal2.gif width="134" height="129" caption="Coal Rock" link="http://www.fossweb.com/modules3-6/EarthMaterials/activities/rockdatabase/sedimentary_rocks/coal.html"]] ||
 * <span style="font-family: Arial,Helvetica,Geneva,Swiss,SunSans-Regular">**Breccia** || <span style="font-family: Arial,Helvetica,Geneva,Swiss,SunSans-Regular">**Coal** ||
 * [[image:http://www.fossweb.com/modules3-6/EarthMaterials/activities/rockdatabase/sedimentary_rocks/images/kona_dolomite.gif width="134" height="130" caption="Dolomite Rock" link="http://www.fossweb.com/modules3-6/EarthMaterials/activities/rockdatabase/sedimentary_rocks/dolomite.html"]] || [[image:http://www.fossweb.com/modules3-6/EarthMaterials/activities/rockdatabase/sedimentary_rocks/images/coquina.gif width="134" height="129" caption="Coquina Rock" link="http://www.fossweb.com/modules3-6/EarthMaterials/activities/rockdatabase/sedimentary_rocks/coquina.html"]] ||
 * <span style="font-family: Arial,Helvetica,Geneva,Swiss,SunSans-Regular">**Dolomite** || <span style="font-family: Arial,Helvetica,Geneva,Swiss,SunSans-Regular">**Coquina** ||
 * [[image:http://www.fossweb.com/modules3-6/EarthMaterials/activities/rockdatabase/sedimentary_rocks/images/diatomite.gif width="134" height="125" caption="Diatomite Rock" link="http://www.fossweb.com/modules3-6/EarthMaterials/activities/rockdatabase/sedimentary_rocks/diatomite.html"]] ||  ||
 * <span style="font-family: Arial,Helvetica,Geneva,Swiss,SunSans-Regular">**Diatomite** ||
 * <span style="font-family: Arial,Helvetica,Geneva,Swiss,SunSans-Regular">**Dolomite** || <span style="font-family: Arial,Helvetica,Geneva,Swiss,SunSans-Regular">**Coquina** ||
 * [[image:http://www.fossweb.com/modules3-6/EarthMaterials/activities/rockdatabase/sedimentary_rocks/images/diatomite.gif width="134" height="125" caption="Diatomite Rock" link="http://www.fossweb.com/modules3-6/EarthMaterials/activities/rockdatabase/sedimentary_rocks/diatomite.html"]] ||  ||
 * <span style="font-family: Arial,Helvetica,Geneva,Swiss,SunSans-Regular">**Diatomite** ||
 * <span style="font-family: Arial,Helvetica,Geneva,Swiss,SunSans-Regular">**Diatomite** ||