An east-west water supply tunnel is to be constructed in bedrock at an elevation of 1,800...

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An east-west water supply tunnel is to be constructed in bedrock at an elevation of 1,800 ft above sea level. The surface is level and at an elevation of 2,000 ft. The tunnel is to be 1,000 ft north of a point designated A, which is located in very weak shale. But a few hundred feet south of it is a well-consolidated conglomerate. Three holes have been drilled by "You Breccia We Can Inc."; the data are as follows, and in each case conglomerate lies below the shale. You will need to draw a map to scale using Hole A as the reference point to solve this problem. Elevation of the Shale/Conglomerate Contact above sea level 1,800 ft Hole A B C Location Reference 700 ft N50°W of A 2,000 ft 010 of A 1,400 ft 0.0 ft a) What is the strike and dip of the conglomerate-shale contact? b) What is the elevation of the contact of conglomerate and shale at the location of the tunnel? c) In what rock would the proposed tunnel be located? d) where would you suggest locating the tunnel and why? An east-west water supply tunnel is to be constructed in bedrock at an elevation of 1,800 ft above sea level. The surface is level and at an elevation of 2,000 ft. The tunnel is to be 1,000 ft north of a point designated A, which is located in very weak shale. But a few hundred feet south of it is a well-consolidated conglomerate. Three holes have been drilled by "You Breccia We Can Inc."; the data are as follows, and in each case conglomerate lies below the shale. You will need to draw a map to scale using Hole A as the reference point to solve this problem. Elevation of the Shale/Conglomerate Contact above sea level 1,800 ft Hole A B C Location Reference 700 ft N50°W of A 2,000 ft 010 of A 1,400 ft 0.0 ft a) What is the strike and dip of the conglomerate-shale contact? b) What is the elevation of the contact of conglomerate and shale at the location of the tunnel? c) In what rock would the proposed tunnel be located? d) where would you suggest locating the tunnel and why?

Answer rating: 100% (QA)

a The intersection of conglomerate and shale occurs at a depth of ... View the full answer