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The erosion or disintegration of rocks, building materials, etc., caused by chemical reactions (chiefly with water and substances dissolved in it) rather than by mechanical processes.
- ‘The problem is most acute in tropical, equatorial and desert regions where the surface environment is particularly fragile because of its long history of intense chemical weathering over geological timescales.’
- ‘Great physical relief results in intense physical erosion and rapid exposure of fresh reactive rock for chemical weathering, but it provides less contact time between water and rocks.’
- ‘This highlights the significance of mechanical weathering compared with chemical weathering for the rate of landscape dissection and lowering.’
- ‘The long-term storage of carbon dioxide is accomplished through chemical weathering of silicate rocks, such as granite and basalt, on the land.’
- ‘Warm and wet climates enhance rapid chemical weathering, whereas cold and dry climates promote more extensive mechanical weathering.’
- ‘Water chemistry at Lily Fen reflects both chemical weathering of the local soils and atmospheric deposition, which includes significant marine aerosols.’
- ‘These criteria focused on clast size and morphology as a result of variation in physical weathering or changes in local chemical weathering.’
- ‘Eventually, however, much of this carbon dioxide would have reacted with rocks during the process of chemical weathering or been used by plants in photosynthesis.’
- ‘Chemical sedimentary tray rocks are formed when the sediment source is a soluble material that is produced by chemical weathering.’
- ‘Yet, in reality, it is the water that is the agent of physical and chemical weathering.’
- ‘The major erosion phases seen earlier had ceased and instead had given way to overall slow degradation of exposed surfaces subjected to intense chemical weathering.’
- ‘Spontaneous heating and burning in old heaps is an extension of the oxidation / chemical weathering process.’
- ‘These results have not yet been fully explained, but they may reflect differences in the chemical weathering of rocks and soil at the Pathfinder site compared with elsewhere on the planet.’
- ‘‘It is not something that you form as a result of lots of chemical weathering,’ he pointed out.’
- ‘Over thousands to millions of years, the physical breakdown and chemical weathering of volcanic rocks have formed some of the most fertile soils on Earth.’
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