Which was not included in the support for Harry Hess’s hypothesis of sea-floor spreading?

granitic rock in the ocean floor
earthquake patterns in subduction zones
magnetic strips in ocean floor rock
the age of the ocean floor rock

Question

Which was not included in the support for Harry Hess’s hypothesis of sea-floor spreading? 

 	
	granitic rock in the ocean floor
	earthquake patterns in subduction zones
	magnetic strips in ocean floor rock
	the age of the ocean floor rock

anonymous · Answer

Earthquake patterns in subduction zones! ;D

anonymous · Answer

Thats what I picked, I just wanted to make sure :3

anonymous · Answer

Right! I was hesitant on this one but I found the answer haha