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Quartz
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Handout Himmotthan The document discusses various rock types and their mineral compositions, focusing on their grain sizes, porosity, permeability, and impacts on water quality. It categorizes rocks into several groups, including mudstone, limestone, schist, granite, and basalt, highlighting their mineral content such as quartz, feldspar, calcite, and mica. For instance, mudstone and claystone are characterized by very fine grains and high porosity but low permeability, while limestone and dolomite contain larger grains of calcite and dolomite, often resulting in higher salinity and total dissolved solids (TDS). The text emphasizes that the presence of minerals like feldspar significantly influences water quality, particularly in terms of TDS and pH levels. Generally, rocks with higher feldspar content contribute to increased salinity and TDS, whereas those with clay and mica tend to have a minimal effect on these parameters. The summary concludes with an overview of how grain size and mineral composition affect the overall hydrological dynamics within different geological formations. Understanding these characteristics is crucial for effective water resource management in various environments.