Name Savannah
INVESTIGATION 7 I-CHECK
EARTH HISTORY
41
4 Scientists recently discovered a patch of oceanic crust deep beneath the Mediterranean Sea that
estimated to be 340 million years old. It is the oldest oceanic crust ever found.
a. If scientists believe Earth is actually 4.6 billion years old, why haven't scientists found older
b.
oceanic crust?
(Mark the one best answer.)
OA Rocks did not cool on Earth until about 340 million years ago.
OB It is too hard to collect samples of oceanic crust.
OC Oceanic crust subducts under continental crust as new oceanic crust forms.
OD Oceanic crust is younger than continental crust.
The oldest surface Earth rocks that scientists have found are continental
to be 3.8 billion