Global plate tectonics and ocean genesis At mid-ocean ridges, where new ocean floor is created by volcanoes, lava is erupted at 1200 deg C.
(new ocean floor; is created; by volcanoes; L:mid-ocean ridges) (lava; is erupted; L:at 1200 deg C.)
new ocean floor lava
is created is erupted
by volcanoes L:mid-ocean ridges
L:at 1200 deg C.