TYPES+OF+ROCK+CHART

TYPES OF ROCKS:

 * === NAME  ===
 * (Examples) ** || ===  CAUSE  === || ===  LOCATION  === || ===  CHARACTERISTICS  === ||
 * === Sedimentary  ===
 * limestone; sandstone; chalk; coal; rock salt; shale; dolomite; conglomerate ** || **  created when layers of sediment (mud, sand, gravel and minerals) settle to the bottom of the ocean and then compacted (pressed together) over thousands of years  ** || **  where oceans or bodies of water once existed or still exist  ** || **  soft, layered, may contain fossils  ** ||
 * === Igneous  ===
 * quartz; pumice; granite; basalt; obsidian ** || **  created when molten rock (lava) inside the Earth pushes through the crust (like in a volcanic eruption) and then cools  ** || **  where volcanoes have or do exist  ** || **  crystalline, glossy, coarse-grained  ** ||
 * === Metamorphic  ===
 * marble; slate; gneiss; schist; quartzite; eclogite ** || **  created when sedimentary or igneous rocks undergo metamorphosis (change) caused by pressure, heat, and water acting on the rocks  ** || **  deep within the earth (where pressure and heat have a very large affect)  ** || **  hard, may contain bands or layers, may contain crystals  ** ||