Types of Faults

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Link to Resource: https://www.fault-analysis-group.ucd.ie/papermodels/models/faults.html#Anchor_faults
Resource Type:Classroom Activities; Curricula and Instruction
Grade Level:
6 7 8 9 10 11 12
Organization:Department of Geology, University College Dublin
Summary:Faults are one of the most impressive and beautiful structures arising from deformation of the earth's crust; we are not, of course, biased! Determining the slip-direction and the total displacement is often not an easy task. Slickensides are useful shear sense indicators, but generally cannot be used for determining the displacement. The displacement can however be obtained when a linear element (e.g. fold axis, intersection of two planes) is displaced by the fault. The models illustrate different types of faults. The faulted block has the same dimensions and stratigraphy. The slip sense on each fault is shown; these can be derived from striations, slickensides etc. (see Fault Gallery). The sense and amount of slip can however also be determined directly from the displacement of a linear element i.e. the intersection line of a sandstone layer and a dyke. It is worth examining the apparent off-sets in map view, perhaps drawing a geological map for the hangingwall block i.e. with the fault scarp eroded. Studets can print out and construct 5 types of faults: normal, reverse, strike-slip, oblique normal, and oblique reverse.
Earth Science Big Ideas:Big Idea 3
NGSS Discplinary Core Ideas:ESS2.B
NGSS Performance Expectations:HS-ESS2-1; HS-ESS2-3; MS-ESS2-3
NGSS Science and Engineering Practices:Analyzing and interpreting data; Developing and using models
NGSS Crosscutting Concepts:Energy and matter: Flows, cycles, and conservation; Patterns; Stability and change
Subjects: activities; fault; geology; model; plate tectonics
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