Introduction to the Brunton Compass. Parts of the Compass Uses of the Brunton Compass - Bearing - Strike and Dip - Trend and Plunge Map Symbols . Text: Compton, p. 16-21; 34-39; Measurement of Attitude and Location; Lab 1 (website). Parts of the Compass. Compass Face
Text: Compton, p. 16-21; 34-39; Measurement of Attitude and Location; Lab 1 (website)
Bearing: direction from one point to another point.
Note: With sighting arm pointing to object, always read the white tip of the needle.
Strike: Direction of the line of intersection between a tilted plane and a horizontal plane.
Note: Read the end of compass needle that makes dip direction to the right of the strike direction (Right-Hand-Rule).
Dip: Angle between a tilted plane and a horizontal plane that is perpendicular to strike.
Note: If use Right-Hand-Rule, dip direction is implied.
Trend: bearing of a linear feature.
Plunge: angle between a tilted linear feature and a horizontal plane.
Note: written as plunge, bearing
Linear Glacial Striations (Maine)
strike and dip (vertical)
strike and dip (horizontal)