Horsetail numerous fault splays near the end of a

Info icon This preview shows pages 3–4. Sign up to view the full content.

View Full Document Right Arrow Icon
Horsetail- numerous fault splays near the end of a fault, fan like in shape Tip line- boundary between slipped and unslipped region Emergent fault- fault that intersected ground surface while still active Exhumed fault- fault intersects ground surface due to erosion, due to inactive ancient fault Blind fault- fault that dies out in subsurface Characteristics of faults and fault zones Brittle Fault Rocks 7. List the bold face terms and make sure you understand their meaning.- Brittle fault rock- broken rock pieces due to brittle faulting Fault gouge- clay sized, poorly consolidated material pulverized by fault Indurated gouge- fault gouge that has been cemented together due to groundwater Fault breccia- consist of angular, poorly sorted clast up to boulder that have been broken up due to fault slip Vein filled breccia- fault breccia that has been cemented together by vein material Cataclasite- fine grained poorly sorted breccia that is well lithified Pseudotachylite- glass material that forms by melted rock due to frictional heat along fault, normal forms at depth Argille scagliose- strongly foliated fault rock formed from pervasive shearing of clay rich or fine grained mica rich rock Slickensides and slip lineations 8. What is the difference between slickenlines and slip fibers? - slip fibers are crystal that grow from irregularities on surface and slickenlines are gouges in rock surface that give a sense of direction 9. Can you tell the sense or direction of slip from slickenlines or slip fibers? Explain.- Yes, slip fibers grow in a stair step manner that indicates direction and slip of the hanging wall, slickenlines can only indicate direction Fault-Related Folds 10. Explain how faults can cause folding or bending of layers- thrust faults slid up over footwall and bend or fold the sediment layers above it causing a fold 11. What are the major types of fault related folds?- fault-fold bend, releasing bends, restraining bends. Draw a picture illustrating them. Shear Sense Indicators 12. List the indicators in table 8.6 and make sure you understand their meaning.- Offset markers- define shear sense if you can define the releative displacement of two points on opposite walls of fault Fault related folds- fault inception folds verge in direction of shear Fiber sheet imbrications- imbrications of slip fiber sheets on a fault provides shear sense Steps on slickensides- microscopic steps that form along slickensided surfaces
Image of page 3

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the 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