The iridium layer at the Cretaceous-Tertiary boundary is ...

[lb_gilbert]

The iridium layer at the Cretaceous-Tertiary boundary is attributed to
 
  A) meteorite bombardment.
  B) massive volcanic eruptions.
  C) massive earthquakes and shock waves.
  D) extinction of the dinosaurs.

Question 2

In what way could sea level rise? Is this likely to happen in the future? Why or why not?
 
  What will be an ideal response?

[mmj22343]

Answer to Question 1

Answer: A

Answer to Question 2

Answer: A rise in sea level could be caused by an increase in spreading rates, such as what occurred during the Paleozoic, or if the polar ice caps were to melt. Although the Mid-Atlantic ridge continues to spread, it is unlikely that our generation, or the one after ours, will witness a rise in sea level due to a high stand of the asthenosphere (as such changes are slow to manifest). A more probable cause of sea level rise is global warming. In either case, it is difficult to predict the future.

[lb_gilbert]

Wow, this really help

[kishoreddi]

Gracias!