Period+2+Group+8

__**Igneous Rocks**__
__**Rhyolite -**__Felsic, fast cooling rate, extrusive, fine grain texture. __**Scorria -**__Mafic, Fast cooling rate, extrusive, fine grain texture. __**Granite -**__Felsic, Slow cooling rate, Intrusive, coarse texture. __**Basalt -**__Mafic, fast cooling rate, extrusive, fine grain texture. __**Pumice -**__Felsic, fast cooling rate, extrusive, fine grain texture. __**Gabbro -**__Mafic, slow and fast cooling rate, intrusive and extrusive, porphyritic texture.  __**Obsidian -**__Felsic, fast cooling rate, extrusive, glassy texture.
 * __Andesite  -__**Mafic, fast cooling rate, extrusive, fine grain texture.
 * __Diorite -__**Felsic, slow cooling rate, intrusive, coarse texture.

__**Sedimentary Rocks**__
__**Limestone -**__chemical, geodes __**Brecchia-**__clastic, poorly **__Shale -__**clastic, wel, fossils __**Sandstone <span style="color: rgb(0, 0, 102)">- **__clastic, well, stratification <span style="color: rgb(0, 0, 102)">__**Siltstone-**__<span style="color: rgb(8, 8, 8)">clastic, well, stratification/hydrocloric acid
 * __<span style="color: rgb(0, 0, 102)">Conglomerate -__**clastic, poorly
 * __<span style="color: rgb(0, 0, 102)">Coal- __**organic
 * __<span style="color: rgb(0, 0, 102)">Chert -__**clastic, well, stratification/fossils
 * __<span style="color: rgb(0, 0, 102)">Coquina -__**organic, sea shells

__**Metamorphic Rocks**__
__**<span style="color: rgb(0, 51, 0)">Marble <span style="color: rgb(0, 51, 0)"> <span style="color: rgb(0, 51, 0)"> -**__ Nonfoliated, Metamorphed from limestone, formed by heat. <span style="color: rgb(0, 51, 0)">__**Schist**__<span style="color: rgb(22, 19, 19)">__**-**__ Foliated, metamphorphed from chlorite, formed by pressure. <span style="color: rgb(0, 51, 0)">__**Gneiss**__<span style="color: rgb(5, 5, 5)">__**-**__Foliated, metamorphed from muskovite, formed by both. <span style="color: rgb(0, 51, 0)">__**Slate**__<span style="color: rgb(14, 12, 12)">__**-**__ Floiated, metamorphed from Shale, formed by pressure. <span style="color: rgb(14, 12, 12)">
 * __<span style="color: rgb(0, 51, 0)">Quartzite -__**Nonfoliated, metamorphed from Quartz, formed by heat.