GLG 111 Lecture Notes - Lecture 8: Lithification, Clastic Rock
Document Summary
Sediment loose fragments (grains) produced by the breakdown (weathering) of rocks or by the precipitation of chemical processes: rock and mineral fragments plant and animal debris precipitation and settling of particles from a fluid. Sedimentary rocks- rocks produced by the lithification of clastic, biochemical, organic, and chemical sediment detrital (clastic) chemical. Detrital sedimentary rocks made of sediment particles (clasts) that are compacted and cemented together. Chemical sedimentary rocks created by the lithification of chemical sediment: inorganic processes chemical sediment formed from evaporation of water solutions, organic processes chemical sediment formed from biological processes. Detrital rocks can be classified by texture (size, shape, sorting of particles) particle size is the primary basis. Detrital sedimentary rock texture gravel is large, clay is small. Shape- how round or angular the grains appear. Sorting the similarity in grain sizes, shapes, and mineralogy, can be poor or well angular have sharp edges, well rounded have smooth grains.
