{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

05 Structural Geology

05 Structural Geology - is known as a fault Components of a...

Info icon This preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
(E) Structural Geology Geologic structures are formed under the application of stress The type of structure produced depends on the nature of the stress and on the rock behaviour Brittle behaviour favours the formation of fractures Plastic (ductile) behaviour favours the formation of folds Folds Plastic deformation results from compression or shear stress Components of a fold — refer to handouts Types of folds — refer to handouts Folding due to compression produces a net horizontal shortening of the crust as well as some thickening Plate collision is a source of immense compressive stresses, hence major fold belts are associated with collisions at plate margins (with ductile rocks) Folded mountains Faults Brittle rock fractures in response to both compressive and tensile stresses as well as shear stresses Where there is relative movement between rocks on either side of the fracture, it
Image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: is known as a fault Components of a fault — refer to handout Types of faults — refer to handouts Tension may produce very steeply sloping faults, whereas compression (in brittle rocks) may produce shallowly sloping faults Block mountains and rift valleys • Unconformities 1. Disconformity The most difficult kind of unconformity to recognize The sedimentary rock layers above and below it are parallel e.g. It can develop as sediment deposition is interrupted for a period of time (say, absent of water for a period of time) 2. Angular Unconformity Bedding planes in rock layers above and below the unconformity are not parallel The presence of an angular unconformity usually implies a significant period of erosion, as well as uplift 3. Non-conformity...
View Full Document

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern