GEOS 212 1st Edition Lecture 9 Outline of Current Lecture Review Three main processes for transporting sediment rivers glaciers wind Big rivers of the world Mississippi Amazon Nile Congo Yangtze Yellow Ganges Indus Sediments on coastlines and continental shelf Sand Mud Skeletons Sediments on deep sea floor turbidites submarine landslide clays mostly windblown skeletons of microscopic plants diatoms quartz and coccoliths calcite Profile view of changes in sediment on continent ocean floor Distribution of Sediment Types on the Seafloor Movies of sediment on coastline deep seafloor o Type and thickness of sediment on deep ocean floor o Minerals in beach sand How does turbidite form Seawater chemistry chemistry of life rocks and volcanoes all connected Chemical processes of weathering salinity of seawater Granite Rock made up of 8 main elements see below Elements combined into three minerals o Quartz elements present Si O and weathering products o Feldspar elements present K Al Si O and weathering products o Mica elements present Fe Mg Al Si O and weathering products Physical Chemical changes along a river system profile diagrams These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute Contributions of rock weathering to seawater chemistry Importance of rock weathering and volcanic gases to oceans atmosphere and life LECTURE 9OUTLINE Gases in Seawater o Review Seds on continents continental shelves and deep sea floor Rock granite minerals elements and weathering products Physical Chemical changes along a river system Gases in seawater volcanoes Chemistry of Life Ca Fe Na K fluids Main control on amounts of elements in seawater removal processes o Examples calcium versus sodium iron versus magnesium chlorine versus sulfate Removal processes Biological Clays Sea floor Evaporation of seawater Global patterns of salinity Source s of water on Earth Hydrologic cycle residence time Plants photosynthesis versus animals respiration Current Lecture SEDIMENT TRANSPORT
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