Presentation on theme: "Sedimentary, my dear Watson"— Presentation transcript:
1Sedimentary, my dear Watson Lab 6Sedimentary, my dear Watson
2Weather and SedimentChemical weathering – chemical decomposition or dissolution of a material (into a solution).Physical weathering – physical decomposition of a material (into grains or clasts).
3Weather and SedimentSediment – loose grains/chemical residues or rocks, minerals, plants & animalsErosion – transport of weathered sediments
4Sedimentary Rocks Form when: Sedimentary rocks are classified by: Sediments collect, compact & harden:LithificationMineral crystals precipitate from an aqueous solutionSedimentary rocks are classified by:CompositionTexture
5Sedimentary Composition Detrital (siliciclastic) –Rock or mineral fragmentsQuartz, feldspar, clay, or lithic fragmentsChemical –Precipitated from aqueous solutionCalcite, dolomite, halite, gypsum, iron bearing minerals, chertBiochemical (bioclasts) –Grains are remains of organismsSee page 116 in lab manual