The Devil's Corkscrew

Directions: Carefully read the article "The Devil's Corkscrew" from the 4/94 issue of Natural History. Answer the questions below using complete sentences where appropriate.

  1. Use your own words to describe what geologist Erwin Hinkley saw when he went to Nebraska in 1891.
  2. Like many geologists, Barbour's explanation of the fossil find changed after more information about it became available. Describe how his explanation changed with time and then discuss why you think other paleontologists disagreed with Barbour's explanation.

  3. How did the author determine that the beavers used their teeth to excavate their burrows?
  4. Why does the author compare the beavers with modern-day prairie dogs?
  5. What does the article say about the ancestors of the modern species of North American beaver?

  6. Strangely enough, the devil's corkscrew fossils themselves have been given a scientific name, Daimonelix. What type of fossil is Daimonelix?
    1. it's a carbonized burrow
    2. it's a trace fossil
    3. it's not considered a fossil
    4. it's a petrified fossil