GR-Tu3-Compass

GR-Tu3-Compass - The normal direction line of the...

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1 CIVL2002 Engineering Geology and Rock Mechanics Use of Geological Compass Tutorial Q3 Orientation of Discontinuities North (N, x ) East (E, y ) South (S) West (W) Depth ( z ) A plane discontinuity A Rock Mass Block O P Q θ ϕ ϕ = dip direction θ = dip or dip angle A view of the dip direction (angle of longitude) of the discontinuity on the horizontal plane North (N) East (E) South (S) West (W) O P ϕ ϕ = dip direction 0 ϕ < 360º Depth (z) The discontinuity plane Q θ P O A view of the dip angle of the discontinuity on
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Unformatted text preview: The normal direction line of the discontinuity = dip angle = the maximum angle between the discontinuity plane and the horizontal plane. = pole 0 ≤ ≤ 90º = angle of latitude of the pole Geological compass Marks for Dip direction (0 to 360) Marks for Dip angle (0 to 90) Pointer for dip angle Compass pointer for the North Expression for Dip direction, Dip (angle) They are expressed in degrees such as 178 / 56 or 026 / 27...
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