mid-ocean ridge Flashcards
1
Q
oceanic crust predominate rock type
A
tholeiitic basalts (mid-ocean ridge basalt (MORBS))
2
Q
where are tholeiitic basalts formed
A
mid-ocean ridges, where adjacent places diverge
3
Q
petrogenesis of oceanic basalts
A
rising mantle iherzolite undergoes adiabatic decompression
practically melts when reaches solidus temp
melt separates, rises to crustal rift
solidifies to form trailing edge of separating oceanic plates
