EESA06H3 Chapter Notes - Chapter 4: Seismic Refraction, Seismic Wave, Continental Crust
28 Feb 2015
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4. 1 deep drilling on continents: the structure and composition of the continental crust is unknown. Findings of deep drilling: the drilling at kola shows that seismic models are being systematically misinterpreted. Geology: deep parts of the earth are studied indirectly, largely through the branch of geology called geophysics, which is the application of physical laws and principles to a study of the earth. It includes the study of seismic waves, and the earth"s magnetic field, gravity and heat. Seismic waves from a large earthquake may pass through the entire earth: geoscientists obtain new information about the earth"s interior after every large earthquake and bomb test. Seismic reflection is the return of some of the energy of seismic waves to the earth"s surface after the waves bounce off a rock boundary. 4. 2 canadian lithoprobe project: the lithoprobe project has been investigating the composition and structure of the canadian shield since.
