Sedimentary Process
Sedimentary Rocks is a rocks that is composed of particles of preexisting rocks that have been weathering , transported, deposited and lithified. The important process that leads to creation of the rocks includes weathering, erosion and transportation, deposition, then burrial and then lithification.
1. Weathering
Weathering is the breakdown of solid rocks, It is a natural process of insitu mechanical disintegration and or chemical decomposition of rocks exposed on the surface of the earth. When the influence of contain physical and chemical agencies of the atmosphere.
The different types of rock weathering are mechanical , chemical and biological, Most resistance in terms of chemical is quartz and least resistance is feldspar.
2. Transportation
Transportation is how sediment move out of the source (Site of weathering) to site of deposition. The different transporting agent are running water, wind, and Ice in the form of glacier.
Different methods of transportation are - 1. Bed load transportation 2. Saltation 3. Suspension and 4. Solution
3. Deposition
When the transporting agent loose their ability to carry due to diminished velocity deposition environment are sites at which sediment rest. For example :- Pluvial (River) environment , delta , beach marine environment etc.
4. Burrial and Lithification
Once sediment have been deposited they must be burried and lithified to become rocks. Each new layer of sediments burries the one beneath ( A little bit deeper ), the weight of overlying sediment would pressure on the sediments would pressure on the sediments and the temp of sediments increase slowly, Lithification is the opposite of weathering. It is the many processes that together to take loss sediments and make it stick together, as a rock. This process is also called consolidation, during this processes many physical and chemical changes take place within the sediment, such changes are called diagnesis.
Diagnesis includes the following two processes.
1. Compaction by Overline Sediment
Involving the lose packing of the individual grains by eliminating the pore spaces.
2. Cementation
Development of secondary minerals in the formation pore spaces which can blinds the sediment particles together. This material may be introduces from the process of groundwater or derived from solution.
Notes:- Data is collected from university notes and person experiences, Main purpose of this articles is to help peoples.
Articles Written by
Ritu Raj Medhi
Founder & President
Chief Technical & Editorial Officers
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