Rocks
Sedimentary Rocks
Chalk Rock Type, Composition, Formation, Occurrence & Uses
Chalk is a soft, porous, and white sedimentary rock. It is a form of limestone but is softer than limestone. ...
Phyllite Rock Type, Composition, Formation, Occurrence & Uses
Phyllite is a foliated metamorphic rock. Due to low-grade pressure, heat, and chemical activity, the rock is composed of flake-shaped ...
Sedimentary Rocks
Chert Rock Type, Composition, Formation, Occurrence & Uses
Chert is a fine-grained and hard sedimentary rock that usually has a biological origin. Chert can also exist inorganically as ...
Sedimentary Rocks
Conglomerate Rock Type, Composition, Formation, Classification, Uses
The conglomerate is an example of a typical sedimentary rock. It is a clastic sedimentary rock usually composed of rounded ...
Quartzite Rock Type, Composition, Formation, Occurrence & Uses
Quartzite is a widely available, hard, cheap, and durable non-foliated metamorphic rock. The rock is economically important because it has ...
Igneous Rocks
Diabase Rock Type, Composition, Formation, Occurrence & Uses
Diabase is a dark-colored fine-grained, intrusive igneous rock. Diabase is also known as dolerite in the United Kingdom and a ...
Igneous Rocks
Granite Rock Type, Definitions, Composition, Formation, & Uses
Granite is one of the most famous rocks in the world. It is a light-colored, coarse-grained intrusive igneous rock. The ...
