Exfoliation of Igneous rock
What is Chemical Weathering? A change in rock composition or chemical make-up Involves water, water vapor, acids, and/or oxygen O2
What are the Types of Chemical weathering? Hydrolysis Carbonic acid in water dissolves calcite. This chemical weathering can hollow out underground caverns Limestone and dolomite both dissolve because they contain calcite
What are the Types of Chemical weathering? Acid rain Carbonic acid in rain water can weather the details of statues and tombstones Ex. Marble & Limestone
What are the Types of Chemical weathering? 2. Oxidation Oxidation of minerals with iron (magnetite, pyrite) results in the formation of rust or iron oxide. This why Mars is the red planet Copper turns rocks green
Rate of Weathering – 3 factors Surface Area Larger area = faster weathering rate Rock Composition Higher Mohs scale = more resistant to weathering Climate Warm & wet weather = faster weathering
What is erosion? The removal and transport of weathered materials by natural agents. Caused by: Glaciers Running Water Gravity Wind Waves
Glaciers & Erosion A glacier is a mass of compact ice and snow that moves under its own weight.