Question

All problems (Earth Science Dinosaurs)

You find some dinosaur fossils in rocks that overlie (are found on top of) an ash bed and that are cut by a volcanic dike. Using radiometric dating, geologists determine the age of the ash bed to be 120 million years (Ma) and the dike to be 100 Ma. What can you say about the age of the dinosaur fossils? Select one: O a. Their age is probably halfway between the age of the ash and the dike: 110 Ma. o b. They are the same age as the ash bed: 120 Ma. O c. They are younger than the dike: <100 Ma. O d. All we can say is that they are younger than the ash (<120 Ma) and older than the dike (>100 Ma). o e. We don't have enough information to say anything meaningful about the age of the fossils. ООО

Answer 1

• Age of the Dianosaur fossil will be:

the option (d) is correct i.e. younger than the ash (120 Ma) and older than volcanic dikes (100 Ma).

• Which clade appear first:

The obtion (b) is correct....The j-clade appeared first because it is below the level of clade I.

• We cant use carbon dating for very old rock:

the option (b) is correct because half life of carbon-14 is about 5000 yrs

• which of the tree depict differnt pattern of relationship:

the correct option is (b).....

• which cladogram depict the relationship.....

The correct option is (a)

• Fossil of featherd dionosaur..................among living birds..

the correct answer is False.