Summary Engineering Geology 214 - Sedimentary Rocks 2

These notes focus on chemical, biochemical, and organic sedimentary rocks, explaining how they form from dissolved minerals, biological activity, and organic matter rather than from transported rock fragments. Topics Covered: - Differences between clastic, chemical, and biochemical sedimentary rocks - Formation of chemical sedimentary rocks through precipitation from solution - Formation of biochemical rocks through the accumulation of shells, skeletons, and biological material - Limestone classification and the role of calcite (CaCO₃) - Types of limestone including travertine, oolitic limestone, coquina, chalk, and fossiliferous limestone - Formation of dolostone through dolomitization - Silica-rich sedimentary rocks and chert formation - Examples of silica rocks including flint, jasper, agate, and petrified wood - Evaporite deposits such as rock gypsum and halite (rock salt) - Organic sedimentary rocks and the stages of coal formation, from peat to lignite, bituminous coal, and anthracite.