A Study of Oceanic Geology Shows That There Are Few

question 6

Multiple Choice

A study of oceanic geology shows that there are few oceanic crustal rocks found that are older than 80 million years. Why?

• A) Oceanic crust was not formed until the beginning of the Precambrian, 80 my ago.
• B) Current radiometric dating techniques cannot date rocks older than 50 million years.
• C) Subduction remelts oceanic rock and most has been destroyed of that age
• D) Oceanic crust is only found at the ridges, which are mostly unsampled.