GEOL-1021EL Lecture Notes - Lecture 8: Geologic Time Scale, Geothermal Gradient, Continental Crust
16 Jun 2018
School
Department
Course
Professor
November 9th
GEOL-1021
Deformation
*****DEFORMATION TO TELL GEOLOGIC HISTORY WILL BE AN EXAM QUESTION*****
•Deformation mainly occurs near plate boundaries
•field observations and mapping of deformation allows us to construct geologic history
•Deformation includes faulting (rigid rocks) and folding (ductile rocks- rocks that can be bent)
•Main types
•Faults
•Folds
•Basic geometric mapping: planes
•Measurable elements on a plane
•Strike (orientation of a horizontal line): compass direction f a rock layer as it intersects a
horizontal surface
•Dip(Maximum slope on that pane): the amount of tilting of the layer as it is measured at
the right angles to strike
•Geologic Maps are a representation of the rocks exposed at earth’s surface, how they are
deformed, and how they relate to each other. the scale of mapping depends on the level of
detail needed
•Geologic Cross sections: diagrams showing the features that would be visible if vertical
slices were made through the part of the crust
