shale

definition: soft finely stratified sedimentary rock that formed from consolidated mud or clay and can be split easily into fragile pieces of rock called slabs.

sedementary rocks

Definition: Sedimentary rocks are types of rock that are formed by the deposition and subsequent cementation of that material at the Earth's surface and within bodies of water. Sedimentation is the collective name for processes that cause mineral and/or organic particles (detritus) to settle in place.

Dolomite

definition: Dolomite is an anhydrous carbonate mineral composed of calcium magnesium carbonate, ideally CaMg(CO₃)₂. The term is also used for a sedimentary carbonate rock composed mostly of the mineral dolomite.

Halite

Definition: Halite, commonly known as rock salt, is a type of salt, the mineral form of sodium chloride. Halite forms isometric crystals.

Breccia

Definition: Breccia is a rock composed of broken fragments of minerals or rock cemented together by a fine-grained matrix that can be similar to or different from the composition of the fragments.

Siltstone

Definition: Siltstone is a sedimentary rock which has a grain size in the silt range, finer than sandstone and coarser than claystones.

sandstone:

definition: Sandstone is a clastic sedimentary rock composed mainly of sand-sized minerals or rock grains. Most sandstone is composed of quartz or feldspar because these are the most common minerals in the Earth's crust.