GEOS 212 1st Edition Lecture 9Outline of Current LectureReview:- 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 flooro 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 productso Feldspar: elements present (K + Al + Si + O), and weathering productso 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
View Full Document
Unlocking...