Detrital Sedimentary Rocks:
* Definition: Formed from fragments of pre-existing rocks (clasts) that have been transported, deposited, and cemented together.
* Example: Conglomerate: A rock made up of rounded gravel-sized clasts cemented together. An example would be a conglomerate found in a riverbed, where the water has rounded the clasts over time.
Limestone:
* Definition: A sedimentary rock primarily composed of calcium carbonate (CaCO3), often formed from the accumulation of shells, coral fragments, or other marine organisms.
* Example: Fossiliferous Limestone: A limestone rich in fossils, like a limestone containing well-preserved shells of ancient marine organisms.
Breccia:
* Definition: A sedimentary rock composed of angular, broken fragments of rocks cemented together. The fragments are usually sharp and jagged.
* Example: Fault Breccia: A breccia formed along a fault zone, where rocks have been fractured and broken by tectonic activity.
Evaporite:
* Definition: A sedimentary rock formed by the evaporation of water, leaving behind dissolved minerals.
* Example: Halite (Rock Salt): A common evaporite formed from the evaporation of seawater, leaving behind sodium chloride crystals.
Chalk:
* Definition: A soft, white, fine-grained limestone primarily composed of the microscopic shells of marine plankton (foraminifera).
* Example: White Cliffs of Dover: A famous example of chalk cliffs in England, formed from the accumulation of countless tiny marine organisms over millions of years.
