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What is the strike of the shaded unit in Figure 6?a. N45E N60W               c. N-S                    d. E-W                   e. None of the above

What is the strike of the shaded unit in Figure 6?a. N45E N60W               c. N-S                    d. E-W                   e. None of the above

Applications and Investigations in Earth Science (9th Edition)
Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
Section: Chapter Questions
Problem 1LR
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  1. What is the strike of the shaded unit in Figure 6?a. N45E N60W               c. N-S                    d. E-W                   e. None of the above     

 

     2. What is the direction of dip of the shaded unit?

          a. North East         b. East         c. South                d. West                

Tilted (dipping) units When geological units are not horizontal, their contacts do not parallel topographic contours. The incline of units' ranges from gentle to steep, to vertical. This is referred to as dip. If units are not horizontal, then they are dipping. The orientation of a unit, i.e. its dip angle, tells us which direction water would drip down the unit. (Think your roof shingles. The way that they are dipping is the direction that rainwater flows off your roof.) The strike is known as the 'waterline'. The strike can be determined by imaging a giant flood. If there was an ocean in your backyard, where would the surface of the water hit your roof? Review Figure 6. Strike Direction of dip Water Angle of dip North 30 Sedimentary beds Figure 6: Dipped rock unit depicting dip and strike
Transcribed Image Text:Tilted (dipping) units When geological units are not horizontal, their contacts do not parallel topographic contours. The incline of units' ranges from gentle to steep, to vertical. This is referred to as dip. If units are not horizontal, then they are dipping. The orientation of a unit, i.e. its dip angle, tells us which direction water would drip down the unit. (Think your roof shingles. The way that they are dipping is the direction that rainwater flows off your roof.) The strike is known as the 'waterline'. The strike can be determined by imaging a giant flood. If there was an ocean in your backyard, where would the surface of the water hit your roof? Review Figure 6. Strike Direction of dip Water Angle of dip North 30 Sedimentary beds Figure 6: Dipped rock unit depicting dip and strike
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