PPT-Class 9. Mid-Ocean Ridges

Dax Soule OCEANESS 410 MidOcean Ridges Dax Soule Modern Map What makes these so different From MacDonald 1982 Learning Goals Be able to sketch the structure of fast and slow spreading midocean ridges and describe how they . 9. Mid-Ocean Ridges. Dax Soule. OCEAN/ESS 410. Mid-Ocean Ridges. Dax Soule. Modern Map. What makes these so different? . From MacDonald 1982. Learning Goals. Be able to sketch the structure of fast and slow spreading mid-ocean ridges and describe how they . Ocean Zones. Which Zone?. 1. Each . group. . will be given a set of words that relate to the different zones of the ocean.. 2. At your table you will . try and place . your words in the correct zone.. 1) Mid-ocean ridges-1-2 km thick5) Hypabassal Complexes-water saturated seds, magma-pepperites –found adjacent Composition-&#x 55%;&#x SiO; is;&#x hot;&#x, re;&#xlati;&#xvely;Composition 5 What You Will Learn. Describe Wegener’s hypothesis of continental drift. . Explain . how sea-floor spreading provides a way for continents to move. . Describe . how new oceanic lithosphere forms at mid-ocean ridges. . Video on Earth 1 million years from now. Theory of Continental Drift. Alfred Wegener . wrote . about his hypothesis of . continental . drift . in the 1900s. .. Continental drift.  is the hypothesis that states that the continents once formed a single landmass, broke up, and drifted to their present locations. . Beloussov. (1907-1990). Famous opponent of plate tectonics. Structural Geologist and Geodynamicist. Director of Geodynamics . Dept. , . Inst. of the Physics of the Earth. Member of Soviet Academy of Sciences (appointed 1953). Drifting Continents. Sea-Floor Spreading. The Theory of Plate Tectonics. Plate Tectonics. Piecing It All Together. The coastlines of some continents seem to fit. together like a jigsaw puzzle.. Drifting Continents. Describe Wegener’s hypothesis of continental drift. . Explain . how sea-floor spreading provides a way for continents to move. . Describe . how new oceanic lithosphere forms at mid-ocean ridges. . Explain . Tom Garrison. Chapter 4:. Ocean Basins. Topics to be Discussed. The Ocean Floor Is Mapped by Bathymetry. Ocean-Floor Topography Varies with Location. Continental Margins May Be Active or Passive. The Topology of Deep-Ocean Basins Differs from That . Plate tectonics review. Earth’s lithosphere is divided into large tectonic plates. They are constantly in very slow, motion.. Plate tectonics review. ____________ pushes the tectonic plates apart in sea floor spreading. This causes the motion of the plates.. and their . answers. so you are ready to practice these new ideas!. The Ocean Floor. Long ago…. People long ago first thought there was no bottom to the ocean!. That’s why they called the lowest level “the abyss”, because it means “bottomless”.. Ocean size and names. Nearly 71% of the Earth’s . surface . is covered by oceans.. 4 major oceans ranked by size: Pacific, Atlantic, Indian, Arctic. .. . (Southern Ocean [proposed] = considered an extension of Pacific, Atlantic, and Indian Oceans, and covers the waters that surround Antarctica). Section 4. Standard . S 6.1 Students know evidence from plate tectonics is derived from the fit of the continents and mid ocean ridges. . Vocabulary. Mid-ocean ridges. Sonar. Sea floor spreading. Deep ocean trench.