Chapter18review - Chapter 18 review Christian Smith 1...

This preview shows page 1 - 2 out of 2 pages.

Chapter 18- review Christian Smith 1. Absolute dating involves a numerical age measurement in actual time units, like thousands or millions of years. Relative dating involves placing sequences of rocks, geological features, and events in the correct order in which they occurred, without necessarily knowing their absolute ages. 2. The law of superposition is the idea or notion that beds in a sequence of horizontal, sedimentary strata become younger upward in the sequence. In other words, younger strata are deposited over older strata. A feature that truncates or cuts across another geologic feature is the younger of the two. 3. The principle of original horizontality states that, in general, stratification in sedimentary beds was horizontal when the beds were deposited. 4. A. Fault A cuts the sandstone layer so the fault is younger. B. Dike A also crosscuts the sandstone layer so the dike is younger. C. Fault A stops at the base of the conglomerate; thus the conglomerate layer truncates the fault and is younger than the fault.D. The conglomerate is cut and displaced by fault B; thus fault B is younger. E. The faults do not cross, but the relationship between the faults and the conglomerate proves that fault A is older than fault B. F. Dike A does not cut the batholith so other relationships must be used. Dike B clearly cuts the batholith; the sill fed by dike B is crosscut by
Image of page 1

Subscribe to view the full document.

Image of page 2
  • Spring '13
  • NguyenVanVuong
  • Geology, Christian Smith, younger strata, older strata

{[ 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