GEOL 1114 Lecture Notes - Lecture 12: Continental Shelf, Depositional Environment, Diagenesis
Document Summary
Sedimentary rocks: sedimentary rocks are classified by the type of material. Two major groups: detrital, chemical, sedimentary formation. Environment determines the nature of the sediments that accumulate (i. e. grain size, grain shape, etc. ) Sedimentary environment: location where a set of physical, chemical, and biological processes operate to generate a characteristic sedimentary formation. Tidal flats, lagoons, and deltas: marine. Deep (seaward of continental shelves; >200-meter water depth) Trace changes in conditions with time at one location. Trace changes in conditions with distance at a particular time. Energy in deposition: the higher the energy, the larger the grains. What is too heavy gets deposited as sediment. Smaller clasts equal lower energy: sedimentary structures. Strata or beds: the layer upon layer of sedimentary rock deposition. Bedding planes: flat surfaces along which the rocks tend to separate or break. Cross bedding: layers within beds that are inclined horizontally.
