Weathering Of Granite Rock

Where joints are closely spaced the large crystals in the granite readily disintegrate to form a sandy regolith known locally as growan.

Weathering of granite rock.

Chemical weathering is the breakdown of rock induced by reactions between rock minerals and groundwater. For example the dartmoor granite was emplaced around 280 million years ago with the cover rocks eroded away soon afterwards exposing it to chemical and physical weathering processes. Description of weathering in rocks due to the effect of weathering there occurs an overall change in the engineering properties of rock mass. The reaction of feldspar minerals in granite with rainwater produces kaolinite white clay known as china clay used in the production of porcelain paper and glass.

For instance limestone is more prone to chemical erosion compared to granite. Chemical weathering mostly depends on the rock type and temperature. The resultant acid water from precipitation acid rain reacts with the rock s mineral particles producing new minerals and salts that can readily dissolve or wear away the rock grains. Various researchers engineers and geologists 4 6 12 16 26 32 have tried to do.

Hydrolysis is the chemical weathering of minerals by a mildly acidic water that forms when rains dissolves trace gases in the atmosphere. Breakdown of rock to depths of many metres induced by the chemical alteration of rock minerals by groundwater.