How to use Brunton compass to measure DIP AND STRIKE

>> YOUR LINK HERE: ___ http://youtube.com/watch?v=8yrS51JjS_w

#GeologicalFieldWorkGFW • This video shows how to measure dip and Strike in field. • Measuring Dip: • To measure the dip of the bedding plane, take your compass and put its side against the rock so that it points in the same direction as the line of dip (The dip line is perpendicular to the strike line). Move the clinometer until the clinometer level bubble is centered. As we did when we found the strike, record where the white tipped end of the clinometer needle is pointing. Note the degrees and the direction. Recall that the dip direction MUST always be perpendicular to the strike direction (e.g., a strike of 40° could only dip to the SE or NW, never NE or SW) • In other words: • AFTER you determine strike, rotate the compass 90°.Place the SIDE of the compass flat against the plane.Adjust the lever on the back of the compass until the air bubble in the Clinometer level is centered.Read the dip directly from the scale in the compass. • • Measuring Trend: • The Fold-out pointer should point down-plunge.Hold the compass horizontally ABOVE the plane (the bubble in the Bull's eye level should be centered).Look directly down through the Slot in the Fold-out pointer .Rotate the compass, keeping it horizontal, until the slot is parallel with the line to be measured. (the line should run straight down the middle of the slot).Read the North end of the compass needle to obtain the value of trend. • Measuring Plunge: • Place the bottom EDGE of the compass flat on the line (the edge should be parallel to the line).Make sure the compass is vertical.Adjust the lever on the back of the compass until the air bubble in the Clinometer level is centered.Read the plunge directly from the scale in the compass (the same way you read dip).

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