UMass Amherst GEO-SCI 103 - Continents and Ocean Basins (4 pages)
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Continents and Ocean Basins
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This lecture compares and contrasts the continents and ocean basins in relation to features of the ocean floor, volcanic action in addition to earthquakes. Additionally, it observes how other factors such as density and thickness result in the composition of continents and ocean basins when plate activity occurs.
- Lecture number:
- 4
- Pages:
- 4
- Type:
- Lecture Note
- School:
- University of Massachusetts Amherst
- Course:
- Geo-Sci 103 - Intro Oceanography GenEd: PS
- Edition:
- 1
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Unformatted text preview:
GEO SCI 103 Lecture 4 Outline of Last Lecture I Exploring the Seafloor II Advances in Seafloor Research III Methods of Gene Regulation at the Translational Level IV Introduction to Mutations Outline of Current Lecture Continents and Ocean Basins I Earthquakes and Seismic Waves Earth Structures Revealed A Internal Structure of the Earth B Reaction with Composition and Density II Continents Ocean Basins and Equilibrium A Comparing and Contrasting Ocean Basins and Continents III Features of the Ocean Floor a Features of the Continental Margins b Features of the Ocean Basin Current Lecture I Earthquakes and Seismic Waves Earth Structures Revealed A Internal Structure of Earth a Solid part of Earth is layered into the core mantle and crust b Earthquakes from a geological standpoint are the natural consequence of the dynamic movements of the Earth s crust and upper mantle c Earthquakes commonly caused by volcanic activity or by slip along a fault zone that suddenly releases energy locked up by frictional forces between solid bodies of rock 1 Focus energy released by an earthquake radiates from the point of origin or focus 2 Epicenter point on the Earth s surface directly above the focus 3 Seismic waves 4 Rayleigh Waves transmit energy along the surface that are primarily responsible for damage produced near the epicenter 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 5 P Waves primary or pressure waves migrate through solid and liquid materials in an alternating push pull or compression motion similar to that of sound waves 6 S Waves secondary or shear waves that migrate through solid materials in a transverse motion analogous to a wave initiated by whipping a rope or rug Cannot travel through liquids 7 By comparing the difference in arrival times of the P and S waves at numerous locations around the Earth it is possible to pinpoint the focus and epicenter of an
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