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Author Question: Explain how we can estimate the geological age of a planetary surface from its number of impact ... (Read 138 times)

natalie2426

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on: Jul 27, 2018
Explain how we can estimate the geological age of a planetary surface from its number of impact craters.
 
  What will be an ideal response?

Question 2

Describe several features on the Earth's crust explained by plate tectonics.
 
  What will be an ideal response?


abctaiwan

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Reply #1 on: Jul 27, 2018
Answer to Question 1

Even though impacts still occur today, the vast majority of craters formed during the bombardment period that ended around 3.8 billion years ago. A surface region that is still saturated with craters must have remained essentially undisturbed for the last 3.8 billion years. In contrast, a surface region that has few craters indicates that the original craters must have been somehow erased since then.

Answer to Question 2

Mountain ranges, volcanic mountain chains, mid-ocean rifts, oceanic trenches, faults, earthquakes, and plate motion.


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