Structure Flashcards
Apparent Dip
Inclination of plane measured in a direction not perpendicular to strike
Apparent Dip Direction
Bearing of a vertical plane containing the apparent dip angle
B
Angle between strike and apparent dip
Bearing
Horizontal angle between a line and a specified coordinate direction, usually north or south
Dip
Inclination of the of greatest slope of an inclined plane, measured perpendicular to strike
Fenster
A window into rocks underlying a thrust fault
Fold Line
A hinge line along which a vertical cross section may be constructed and then flattened out to a horizontal or map view
Growth Fault
Fault that forms contemporaneously with deposition in sedimentary rock. The throw increases with depth and the sed. units on the downthrown side are thicker than the corresponding units on the upthrown side
Heave
Amount of horizontal displacement on a fault
Hinge Line
Axis along which curvature of a fold is greatest
Inclination
Vertical angle between the horizontal and a plane or line measured downward
Klippe
Thrust sheet completely surrounded by exposed footwall
Listric Fault
Fault with curved fault plane, becomes progressively flatter with depth
Nappe
Sheetlike rock unit moved over other rocks on a horizontal surface
Net Slip
Distance between 2 formerly adjacent points on either side of the fault, measured on fault surface
