Geologic Map Interpretation Concepts

The video tutorial explains how to find strike and dip on a geologic map using a compass. It covers the map details, including the Saquatchi fault, and demonstrates the process of measuring strike and dip. The tutorial also explains how to calculate dip direction and provides examples of different locations on the map. The video concludes with a summary of the key points and encourages viewers to subscribe.

What is the primary tool used to find strike and dip on a geologic map?

• A GPS device

• A protractor

• A compass

• A ruler

Which fault is located in the northwest area of the map?

• San Andreas Fault

• New Madrid Fault

• Saquatchi Fault

• Hayward Fault

What does a long line with a shorter line perpendicular to it on a geologic map indicate?

• The elevation of the terrain

• The strike and dip of rock layers

• The location of a fault

• The direction of the river

How is a 90-degree dip represented on a geologic map?

• A horizontal line

• A circle

• A vertical line

• A line with a perpendicular line centered over it

What is the strike direction if the reading is 98 degrees east southeast?

• South 8 degrees

• West 98 degrees

• East 98 degrees

• North 8 degrees

If the strike reading is 278 degrees west northwest, what is the dip direction?

• North 8 degrees

• South 8 degrees

• East 8 degrees

• West 8 degrees

What is the strike reading near the river if it is 30 degrees from the north?

• Northwest 30 degrees

• Southeast 30 degrees

• Northeast 30 degrees

• Southwest 30 degrees

What is the dip direction if the strike reading is 30 degrees and the dip is towards the southeast?

• 150 degrees to the southeast

• 120 degrees to the southeast

• 90 degrees to the southeast

• 60 degrees to the southeast

What do two crossed lines inside of circles on a geologic map indicate?

• Horizontal rock layers

• A fault line

• A mountain peak

• A river

What is the dip amount near the river if it is angling into the earth at 8 degrees?

• 16 degrees

• 30 degrees

• 8 degrees

• 90 degrees