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Examples are chert and rock salt.
Chemical Weathering:
The breaking down of surface rock material by solution or chemical alteration. Common alteration processes are oxidation and hydrolysis.
Chert: ...
chert -- Hard, dense sedimentary rock, composed of interlocking quartz crystals and possibly amorphous silica (opal). The origin of the silica is normally biological, from diatoms, radiolaria or sponge spicules. Synonymous with flint.
chert A cryptocrystalline form of quartz, microscopically granular. Occurs as nodules and as thin, continuous layers. Duller, less waxy luster than
chalcedony. Occurs in limestone, dolostone, and mudstones.
Deichert, L. A. and Hamlet, J. M., 1992, "Non-point groundwater pollution potential in Pennsylvania," ASAE International Winter Meeting, Nashville, Tennessee, 15-18 December, 1992, Paper No. 922531.
United States Army Corps of Engineers
^ Ritter, John. "Lawsuit pits risks and roads", USA Today, 2003-06-03.
^ Sive,D. & Chertok,M., "Little NEPAs" and Environmental Impact Assessment Procedures ...
 See also: Map, Surface, Geographic, Environment, Area
  
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