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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Gurmeet Singh posted an Question
September 23, 2020 • 22:12 pm
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30 points
30 points
- IIT JAM
- Geology (GG)
Sir here is the formula for apparent dip tan(alfha) = tan(theta) * cos(phi). sir how to know phi wht is phi.
A plane has an attitude of 270°/30° N. Find the apparent dip of the plane along a section that is oriented along 180°. Choose conly ONE best answer. 25 B 30
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Rahul kumar Best Answer
Answer: phi is the angle between true dip and apparent dip direction. Here in this question, true dip direction is towards N and the direction in which apparent dip is asked is on 180° Plane (N-S section). Since the bed has the true dip direction is same as the section in which apparent dip has been asked; the apparent dip in that section will be same as that of true dip. In this question the angle "phi" is 180°-180°= 0°. Using formula, tan(alpha)=tan(theta) × cos(phi) Since, phi=0°, so cos(phi)=1 i.e., tan(alpha)=tan(theta) i.e., apparent dip is same as that of true dip.