GEOS 212 1st Edition Lecture 8Outline of Last Lecture - Rivers- Headwaters, flood plains, and Delta plus a world tour of flood plains and major deltas- Other types of sediment transport besides rivers (glaciers and wind)- Types of sediments at different ocean depths and where they came from (sand, mud, skeletons)- Sediment transport diagramOutline of Current LectureLECTURE 8 OUTLINE (Seawater Chemistry – 10 February 2015) 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 flooro Minerals in beach sand? How does turbidite form?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.- 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)- Contributions of rock weathering to seawater chemistry Importance of rock weathering and volcanic gases to oceans, atmosphere, and life!Current Lecture: SEDIMENT
View Full Document
Unlocking...