Do volcanos support the sea floor spreading hypothesis?
one way is the age of the rocks snd another way would be the lava in the lithospher moving to form different rocks
"Magnetic Polarity: the North and South magnetic poles have switched positions throughout Earth's history... the record of magnetic polarity in the rocks of the ocean floor provided unequivical support for the seafloor spreading hypothesis." - as quoted in chp. 4, pg. 94, from the textbook "The Good Earth: Introduction To Earth Science"