The second classification, chemical weathering, involves the direct effect of atmospheric chemicals or biologically produced chemicals also known as biological weathering in the breakdown of rocks, soils and minerals.
42.
Where internal mudstone and siltstone layers interrupt the limestone, you can expect the rock to be more resistant to the chemical weathering because of the comparative lack of limestone.
43.
Tropical weathering ( laterization ) is a prolonged process of chemical weathering which produces a wide variety in the thickness, grade, chemistry and ore mineralogy of the resulting soils.
44.
Although this is a potential source of error for terrestrial rocks, it is irrelevant for lunar rocks and meteorites, as there are no chemical weathering reactions in those environments.
45.
These acids are components of acid rain, lowering the pH of soil and freshwater bodies, sometimes resulting in substantial damage to the environment and chemical weathering of statues and structures.
46.
This led to severe chemical weathering of the granite to saprolite rich in kaolin clays, decomposed from the large visible crystals of potassium feldspar that are so conspicuous in the granite.
47.
Chemical weathering of granite occurs when dilute carbonic acid, and other acids present in rain and soil waters, readily grus, which is often made up of coarse-grained fragments of disintegrated granite.
48.
Because of the increase in surface area, chemical weathering can attack each newly made fragment from all sides and can go deeper into bedrock as new cracks are formed or older ones extended.
49.
The submergence of Laurentia ended a lengthy period of widespread continental denudation that exhumed and deeply eroded Precambrian rocks and exposed them to extensive physical and chemical weathering at the Earth s surface.
50.
Rock can be turned into soils through chemical weathering and high rainfall, transported away somewhere else either by water or landslides / soil creep / slow flow processes etc pretty quickly in the tropics.
