Description of faults. Geological Maps 3-Faults 4 moves downward relative to the other resulting in a stretching of the strata (B). Detailed mapping of the sea floor has revealed no surface expression of this fault. All of the topics presented in Chapter 2 fall under the sphere of geology, and questions or problems in characterizing soils or 2019 Geotechnical Manual Page 2 of 15 is too complex and diverse to cover within the scope of this manual. In the illustrated example, a fault surface is exposed in a ravine. Slickenlines lying in a fault surface track the slip direction. Geologic maps show the distribution of the various igneous, sedimentary, and metamorphic rocks at Earth’s surface in plan view. The relative position of the hanging wall and footwall (as discussed in GY 111 lectures) is also indicated on the diagram. A left-lateral strike-slip fault. 19 Normal: rocks above the fault plane, or hanging wall, move down relative to the rocks below the fault plane, or footwall. Lecture notes are available as PDF files. The contacts between different geologic formations CE 437: Structural Geology Notes 3 IV. You may need to install Acrobat Reader to obtain the PDF documents. • Fault zones and fault rocks • Types of faults and terminology • Slip vs. separation • Faults in wells • Fault propagation Terminology Hanging wall Foot wall Faults, fault zones, shear zones Fault Zone Shear Zone Fault zone geometry depends on mechanical stratigraphy (Richard et al., 2013) Fault Readings: Reading in Fossen, Structural Geology textbook, pages 119-126, and 135-138, 151-185 Download PDF : Roadside Geology of Missouri, by Charles G. Spencer. STRUCTURAL GEOLOGY ALONG THE NORTHWESTERN COLUMBIA RIVER BASALT MARGIN, WASHINGTON by Newell P. Campbell WASHINGTON DIVISION OF GEOLOGY AND EARTH RESOURCES OPEN FILE REPORT 88-5 November 1988 This report has not been edited or reviewed for conformity with Division of Geology and Earth Resources standards and nomenclature The block that should be in the foreground has been eroded away. The geology student is standing where the foreground block was prior to erosion. Reverse: rocks above the hanging wall moves up relative to the footwall Strike-slip: rocks on either side of a nearly vertical fault plane move GEOLOGIC MAPS . A fault on which the two blocks slide past one another. The Coal Oil Point fault is located approximately 4,000 feet south of the San Joaquin Figure 3. Types of Strike-slip fault movement. PURPOSE: To be able to understand, visualize, and analyze geologic maps . Faults fracture = a discontinuity or break in rock fault = a discontinuity in which one block has slipped past another (Mode II or III) joint = a discontinuity in with no slip parallel to fractures some opening (Mode I) 1. Download PDF : Missouri Landscapes: A Tour Through Time, by John Hawker. Hardcopy $10 . Lecture Index: Notebook terms./ Description of idealized fault components./ Fault zone rocks and structures./ Fault recognition at map scale./ A traditional fault classification. The fault is located about 200 feet south of both Coal Oil Point and Goleta Point. The San Andreas Fault is an example of a right lateral fault. The bedrock geology will be discussed only in generalities because it . Hanging wall – HW – block above fault plane A fault is a planar discontinuity along which displacement of the rocks occurs. Hardcopy $20 : Revised Recharge Areas of Selected Large Springs the Ozarks, by James W. Duley and Cecil Boswell . 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