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Tectonophysics

Midterm Exam Preperation

QuestionAnswer
Apparent dip Dip of a plane in an imaginary vertical plane that is not perpendicular to the strike. The apparent dip is less than or equal to the true dip.
Attitude Orientation of a geometric element in space.
Cross section Plane perpendicular to the Earth’s surface.
(True) dip The slope of a surface; formally, the angle of a plane with the horizontal measured in an imaginary vertical plane that is perpendicular to the strike.
Dip direction Azimuth of the horizontal line that is perpendicular to the strike.
Foliation General term for a surface that occurs repeatedly in a body of rock (e.g., bedding, cleavage).
Lineation General term for a penetrative linear element, such as the intersection between bedding and cleavage or alignment of elongate grains
Pitch or Rake Angle between a linear element that lies in a given plane and the strike of that plane.
Plunge Angle of linear element with earth’s surface in imaginary vertical plane.
Plunge direction Azimuth of the plunge direction.
Position The geographic location of a geometric element (e.g., an outcrop).
Profile plane Plane perpendicular to a given geometric element; for example, the plane perpendicular to the hinge line of a fold.
Strike Azimuth of the horizontal line in a dipping plane or the intersection between a given plane and the horizontal surface (also trend).
Trace The line of intersection between two nonparallel surfaces.
Trend Azimuth of any feature in map view; sometimes used as synonym for strike
Created by: user-2039592
 

 



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