The fact that no oceanic crust older than 180 million years (Jurassic)has been found indicates what?
A) The break-up of Pangaea must have occurred before the Jurassic Period.
B) The ocean basins must be older than Jurassic age.
C) The movement of continents must have begun no earlier than the Jurassic Period.
D) The break-up of Pangaea must have begun at about the same time as these oldest basalts were formed.
E) The movement of continents must have begun no earlier than the Jurassic Period AND The break-up of Pangaea must have begun at about the same time as these oldest basalts were formed.

Question

Quizplus · Accepted Answer

The absence of oceanic crust older than 180 million years suggests that the break-up of Pangaea and the formation of new oceanic crust began around the Jurassic period.

The Fact That No Oceanic Crust Older Than 180 Million