earth science lab

Relative dating methods:

Using the diagram below, and the rules of relative dating, answer the following questions.

  1. Which unit was being deposited when the fault happened?
  2. Explain why the funny line between units 3 and 4 is a disconformity, and not an angular unconformity.
  3. Hypothetically, if the trees and ground at the top were covered by the ocean, and deposition resumed, what type of unconformity would be above unit 12, and why?
  4. Would unit 11 likely to be present when the fault happened? Why or why not?
  5. Explain why units 1-5 were not deposited in this position.
  6. In some areas, faults are known to act as a petroleum trap. If unit 2 has oil, and unit 3 is shale, what part of unit 2 would you drill into, above or below the fault, and why?

Radiometric dating:

Answer the following questions.

  1. In order to ascertain useful dates on rock units to help determine the age of major events. Your mission is to date what is thought to be a very old fossil with a volcanic ash layer immediately above the fossil. We do know the fossil is at least more than 300 million years old. Should we use carbon 14 to date the fossil, or uranium 238 to date the volcanic ash layer, and why?
  2. We find samples of an igneous rock demonstrate it has been through 3 half-lives. The test element has a half-life of 300 million years. How old is the rock?
  3. If the parent isotope starts with 100 grams, but your samples yield only 6.25 grams of the parent isotope, how many half-lives have passed?
  4. What unstable isotope would be best to refine the date of bones found in a cave hearth built by humans between 20,000 and 40,000 years ago?
  5. Argue with the following: A stone tool fashioned from a chunk of obsidian yields a date of 3,000,000 years old, therefore, the tool was made by a human 3,000,000 years ago.

Calculate the price of your order

550 words
We'll send you the first draft for approval by September 11, 2018 at 10:52 AM
Total price:
$26
The price is based on these factors:
Academic level
Number of pages
Urgency
Basic features
  • Free title page and bibliography
  • Unlimited revisions
  • Plagiarism-free guarantee
  • Money-back guarantee
  • 24/7 support
On-demand options
  • Writer’s samples
  • Part-by-part delivery
  • Overnight delivery
  • Copies of used sources
  • Expert Proofreading
Paper format
  • 275 words per page
  • 12 pt Arial/Times New Roman
  • Double line spacing
  • Any citation style (APA, MLA, Chicago/Turabian, Harvard)

Our guarantees

Delivering a high-quality product at a reasonable price is not enough anymore.
That’s why we have developed 5 beneficial guarantees that will make your experience with our service enjoyable, easy, and safe.

Money-back guarantee

You have to be 100% sure of the quality of your product to give a money-back guarantee. This describes us perfectly. Make sure that this guarantee is totally transparent.

Read more

Zero-plagiarism guarantee

Each paper is composed from scratch, according to your instructions. It is then checked by our plagiarism-detection software. There is no gap where plagiarism could squeeze in.

Read more

Free-revision policy

Thanks to our free revisions, there is no way for you to be unsatisfied. We will work on your paper until you are completely happy with the result.

Read more

Privacy policy

Your email is safe, as we store it according to international data protection rules. Your bank details are secure, as we use only reliable payment systems.

Read more

Fair-cooperation guarantee

By sending us your money, you buy the service we provide. Check out our terms and conditions if you prefer business talks to be laid out in official language.

Read more