Rocks
Sedimentary Rocks
Shale Rock Type, Color, Composition, Formation, Occurrence, & Uses
Shale is an abundant, fine-grained, clastic sedimentary rock. The rock forms when silt and clay-sized mineral particles compress. Its composition ...
Sedimentary Rocks
Sandstone Rock Type, Composition, Formation, Occurrence, & Uses
Sandstone is a clastic sedimentary rock. It is the most common sedimentary rock found in sedimentary basins worldwide. Sandstone is ...
Sedimentary Rocks
Rock Salt Type, Composition, Formation, Occurrence, Mining & Uses
Rock salt is a sedimentary rock primarily composed of halite. Halite is a mineral of sodium chloride (common salt), NaCl. ...
Sedimentary Rocks
Coal Rock Type, Composition, Formation, Rank, Types & Uses
Coal is one of the most commonly used rocks in the world. It is an organic sedimentary rock that forms ...
Novaculite Rock Type, Composition, Formation, Occurrence & Uses
Novaculite is a unique metamorphic rock native to only the Ouachita Mountains of Arkansas and Oklahoma. It is also known ...
Igneous Rocks
Andesite Rock Type, Composition, Formation, Occurrence & Uses
Andesite is a gray-black volcanic igneous rock. The word andesite is derived from Andes Mountains in the western part of ...
Sedimentary Rocks
Siltstone Rock Type, Color, Composition, Formation, Occurrence, & Uses
Siltstone is a clastic sedimentary rock. It is characterized as mudrock because it is mostly composed of silt. A typical ...
Sedimentary Rocks
Iron Ore Type, Formation, Occurrence & Uses
Iron ores are minerals and rocks from which metallic iron is extracted. Iron ore is not designated as a rock, ...
Sedimentary Rocks
Flint Rock Type, Composition, Formation, Occurrence & Uses
Flint is a durable, tough, and hard sedimentary rock. It is a microcrystalline or cryptocrystalline quartz. The rock is often ...
Sedimentary Rocks
Dolomite Rock Type, Composition, Formation, Occurrence & Uses
Dolomite is a sedimentary rock with a high percentage of dolomite mineral, CaMg(CO3)2. It is a carbonate rock that is ...
