GEO 101 - Folds and Faults Actual study set with Questions and correct/verified Answers

GEO 101 - Folds and Faults Actual study
set with Questions and correct/verified
Answers
Geologic Structures - ANSWER-originate from horizontal rock layers
How do rocks deform - ANSWER-bend (fold) - ductile


break (fault) - brittle
How many geologic structures are there and what are they? - ANSWER-4
Dip
Fold
Fault
Joint
Dip - ANSWER-Angle relative to horizontal surface
Fold - ANSWER-Bend as ductile rock compressed or sheared
Fault - ANSWER-Break along which movement occurs
Joint - ANSWER-Break along which no movement occurs
What questions can we ask about geologic structures? - ANSWER-Which way do these rocks dip?


How much do they dip?


Need way to describe orientation of rock layers and geologic structures
How can we describe the orientation of geologic structures? - ANSWER-Geometry of Planes
- strike
- dip


Geometry of Folds
- axis
- trend
- plunge
Dip Direction - ANSWER-Direction layer tilted in
Dip Angle - ANSWER-Angle tilted layer makes with horizontal surface
Strike - ANSWER-Direction perpendicular to dip direction
Strike (general) - ANSWER-Orientation of line formed by intersection between inclined surface (rock
layer) and horizontal surface (earth)
Dip (general) - ANSWER-Angle in degrees between horizontal surface (earth) and inclined surface (rock
layer) measured perpendicular to strike