ESS15_LEC11F10_SedsSeawater_2perpage - Introduction to...

Info icon This preview shows pages 1–6. Sign up to view the full content.

View Full Document Right Arrow Icon
1 Lecture 11: Sediments and seawater Introduction to Oceanography Vancouver, Canada, E. Schauble, UCLA Introduction to Oceanography Extra Credit video screening “Condition Black” Oct. 22, 6:00pm - 7:30pm Moore 100 Monterey Bay Aquarium wave room, E. Schauble, UCLA •Midterm: Friday Oct. 22 Sections A, B, D, H, L, M ! Humanities A51 Sections C, E, F, G, I, J, N, O ! Moore 100 Midterm review session (question & answer format) Oct. 20, 5:00pm - 7:00pm in Franz 1178
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
2 Grain Size Sediment Classification Typical Particle Sizes: Particle Name Particle Diameter Gravel, Granules & Pebbles 2 -64 mm Sand 0.062 - 2 mm Silt 0.004 - 0.062 mm Clay < 0.004 mm Peas: Renee Comet, Natl. Cancer Inst., Public Domain, ; Sugar, Fritzs, Wikimedia Commons, CC A S-A 3.0, http:// visualsonline.cancer.gov/details.cfm?imageid=2612; Powdered sugar, Wikimedia Commons, JonathanLamb, Public Domain, File:Confectioners-sugar.jpg; Laser printer, Wikimedia Commons, Pierre Bauduin, CC A S-A 3.0, http:// commons.wikimedia.org/wiki/File:HP_LaserJet_4000n.jpg Genetic Classification of Sediments Terri genous : from continents Bio genous : from biological sources Hydro genous : seawater precipitates Sometimes referred to as “authigenic” -- means formed in place Cosmo genous : extraterrestrial sources
Image of page 2
3 Hydrogenous Sedimentary Deposits Chemical deposits formed by precipitation – Grow at water-sediment interface – Manganese nodules “Hughes” Glomar Explorer USGS/NOAA, Public Domain, http:// Japan Agency for Marine-Earth Science and Technology, Attribution uncertain, appears to be widely disseminated, (e.g., http:// weapons/q0268.shtml) and thus may be Public Domain Cosmogenic Sediments Sediments from space Cosmic dust or meteorite impact K-T Boundary layer, Gulf of Mexico sediment core, MARUM Research Center Ocean Margins, Bremen University , Bremen – Germany, Older Younger
Image of page 3

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
4 K-T boundary in sediment Norris et al. (1997) Ocean Drilling Program Preliminary Report, publications/prelim/171B_prel/171Bprel.pdf Impact crater Sample location Figure based on GEBCO bathymetric map Tektites, Mila Zinkova, Wikimedia Commons, CC A S-A 3.0, http:// en.wikipedia.org/wiki/ File:Two_tektites.JPG Rate of sediment addition: Sediment Type Rate (m/Myr) Continental Margins ~ > 50 = 0.05 mm/yr Deep Sea Calcareous 10 - 30 Siliceous 2 - 10 Clay 0.5 - 2 Manganese Nodules 0.001 fast slow
Image of page 4
5 BIG PICTURE ON SEDIMENTS Terrigenous near continents High Bioproductivity: – Calcareous oozes above CCD – Silicieous oozes below CCD Abyssal clays where nothing else is getting deposited Give recent (~200 Myr) historical record
Image of page 5

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 6
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern