Assertion: oceanic crust | /r/AtLocation | the ionian sea
Facets:
Source sentences:
text: The oldest existing oceanic crust is in the Ionian Sea, part of the eastern Mediterranean basin.
text: The oldest oceanic crust exists in the Ionian Sea and is only millions of years old as opposed to some rock in Quebec, Canada where the continental crust is estimated at 4 billion years old.