ROCK CYCLE –SEDIMENTARY NOTES

Brought to you by: Mr. Henderson

Formation

Process of changing rocks due to… Weathering

(breakdown of rock)

Erosion (movement of weathered material)

Compaction of these sediments and cementation with CaCO3 or SiO2

Types of Sedimentary Rocks

Clastic – based on grain size

Very fine – clay

Fine - silt

Types of Sedimentary Rocks – Cont’d.

Coarse – sand

Moderate – Arkose

Pebble – Conglomerate

Boulder

Types of Sedimentary Rocks – Cont’d.

Chemical – due to a chemical process or organic material being present

Rock Salt

Evaporate – due to the evaporation of water

Biochemical – organic material such as decaying flora present

Types of Sedimentary Rocks – Cont’d.

Coal

Gypsum

Lechuguilla Cave – Gypsum Crystals

Reactive – effervescence in presence of acid

Types of Sedimentary Rocks – Cont’d.