L20_SeismicRefractionIII-page7 - tangent to all the circles...

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Applied Geophysics – Refraction III Rockhead determination for waste disposal site Example Refractor depth profile •Us ing T G , the refractor and overburden velocity, we can calculate the depth of the refractor beneath each geophone • Note it is the distance of the refractor from the geophone so draw
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Unformatted text preview: tangent to all the circles Ground surface Refractor - basalt Applied Geophysics – Refraction III Archeological investigations Examples Locating the vallum Adjacent to Vindobala Fort on Hadrian’s Wall • Want to locate the buried vallum for possible excavation and preservation • Vallum: a flat bottomed ditch (!)...
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