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Assignment help 5238

  1. A basaltic layer, dated at 18 million years, occurs concordantly within a sequence of sedimentary rocks. Using the principles relevant to Relative Time Dating, describe the evidence for which you would look in order to determine the order of events. (Keep in mind that basalt may be either intrusive or extrusive.) Be specific. Next, determine how old the rocks are above and below the basalt. (Be as specific as you can.)
  2. Describe radiometric dating and discuss three prerequisites that must be met in order to obtain a reliable radiometric date on a granite batholith. What are the various methods of radiometric dating that may be used?
  3. Name the three major types of unconformities and describe a sequence of events that might produce each. Be specific and include rock types and processes that each includes. What does this tell you about the events that occurred during the gap in the rock record?

*Must be at least three paragraphs in length each.


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