ORIENTATION OF ROCKS: MEASURING DIP AND STRIKE

  Agbor Taku Junior    May 1, 2019    0



MEASURING DIP AND STRIKE
ILLUSTRATION EXPLANATION
MEASURING THE DIP
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1) Find a good surface that is representative of the overall dip of the plane to measure. Determine the general direction of dip pouring fluid over the bedding plane to see which way it runs.  In some cases it may be necessary to smooth out the variations on the surface by placing a notebook or clipboard on the bedding plane, making sure to avoid irregularity. 2) Prepare the compass-clinometer for the clinometer mode by setting the top of the clinometer part so that it is parallel to the long edge of the compass-clinometer (i.e. put the compass dial at 90–270°). 3) Obtain Dip magnitude by placing the long edge that is at the base of the clinometer scale on the bedding plane, with the long edge of the compass-clinometer parallel to where you estimate the maximum dip direction lies (i.e. pointing down the slope). While looking at the clinometer reading, carefully rotate the compass-clinometer device slightly (as shown by the arrows) to find the line of maximum dip. Read off the maximum dip.
MEASURING THE STRIKE           dipStrikefull3

 

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The strike direction is exactly perpendicular to the dip direction.1)    To measure the Strike, remember where the maximum dip lies, lift the compass-clinometer and place the long edge of the compass-clinometer along the line of strike. Pivot the compass-clinometer window until it is horizontal.2)    Rotate the compass dial so that the compass needle lines up with the red outline for the north direction, checking that the compass-clinometer is still horizontal. Take the reading of the strike from the dial.

3)    You can double check that the strike direction is correct by placing the compass on its long edge along the strike line and checking that the dip is 0° (don’t forget to adjust the compass to the clinometer mode.

 

 

 








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