Search results
Results from the WOW.Com Content Network
What links here; Related changes; Upload file; Special pages; Permanent link; Page information; Cite this page; Get shortened URL; Download QR code
Chemical weathering takes place when water, oxygen, carbon dioxide, and other chemical substances react with rock to change its composition. These reactions convert some of the original primary minerals in the rock to secondary minerals, remove other substances as solutes, and leave the most stable minerals as a chemically unchanged resistate .
Ferrallitisation is the process in which rock is changed into a soil consisting of clay and sesquioxides, in the form of hydrated oxides of iron and aluminium.In humid tropical areas, with consistently high temperatures and rainfall for all or most of the year, chemical weathering rapidly breaks down the rock.
Dialects can be defined as "sub-forms of languages which are, in general, mutually comprehensible." [1] English speakers from different countries and regions use a variety of different accents (systems of pronunciation) as well as various localized words and grammatical constructions.
Chemical weathering of rocks that leads to the formation of Liesegang rings typically involves the diffusion of oxygen in subterranean water into pore space containing soluble ferrous iron. [7] Liesegang rings usually cut across layers of stratification and occur in many types of rock, some of which more commonly include sandstone and chert . [ 3 ]
As faults are zones of weakness, they facilitate the interaction of water with the surrounding rock and enhance chemical weathering. The enhanced chemical weathering increases the size of the weathered zone and hence creates more space for groundwater. [33] Fault zones act as aquifers and also assist groundwater transport.
The difference in chemical weathering time can span millions of years. For example, quickest to weather of the common igneous minerals is apatite , which reaches complete weathering in an average of 10 5.48 years, and slowest to weather is quartz, which weathers fully in 10 8.59 years.
This gallery includes userbox templates about dialects of the English language. You may place any of these userboxes on your user page . Some of these templates have multiple options, so visit the template for further information.