1. SEDIMENTARY ROCK
Mod E. U.3 L.3

2. Definition
Rock that forms when sediments are compacted and cemented together

3. Sedimentary Rock Layers

7. Formation (processes)
Weathering and erosion break down existing rock into sediment.
Sediment is deposited in layers called strata
(Think Grand Canyon)

8. Rocks get compacted and cemented
- compaction – due to pressure
- cementation – glue together

9. Three types of Sed. Rocks: 1. Clastic, 2. Organic, and 3. Chemical

10. 1. Clastic Fine grained e.g. Shale (from mud)
Classified by texture
Fine grained e.g. Shale (from mud)
Medium –grained e.g. Sandstone (from sand)
Coarse-grained e.g. Conglomerate (from pebbles)

11. Shale - Fine grained

12. Sand stone - fine to medium grained

13. Coarse-grained Conglomerate Breccia
Conglomerate – Rock particles have rounded edges
Breccia – rock particles have sharper edges

14. 2. Organic Sediment made up of remains of living organisms
Shells, fossils, coal

15. Coquina

16. Chalk: A fine-grained, light-colored limestone formed from the calcium carbonate skeletal remains of tiny marine organisms.

17. Coal

18. 3. Chemical
Minerals dissolved in water are crystallized when water evaporates
e.g.Limestone: calcium carbonate or calcite

19. Limestone

20. Limestone

21. Rock Salt or "halite" is a chemical sedimentary rock - forms from the evaporation of ocean or saline lake waters.

22. Sedimentary rocks formed as chemical precipitates.
 Name of Rock
 Precipitate Type
 Halite
 Sodium Chloride
 Gypsum
 Calcium sulfate
 Silcretes
 Silica
 Limestone
 Calcium Carbonate
 Dolomite
 Calcium Magnesium Carbonate

23. Halite Limestone

24. Dolomite Chalk

25. Silcrete
It is a hard and resistant material, and though different in origin and nature, appears similar to quartzite,
Formed from precipitated, compacted and hardened soluble minerals in soil.
Science/AAAS.
By Vincent Mourre / Inrap - Own work, CC BY-SA 3.0,

27. Homework
Worksheet