Since the Earth's crust solidified billions of years ago, plates of its crust have been drifting all over the globe .
(the Earth's crust; solidified; billions of years; T:ago) (plates of its crust; have been drifting; L:all over the globe; T:Since the Earth's crust solidified billions of years ago)
the Earth's crust plates of its crust
solidified have been drifting
billions of years T:ago
L:all over the globe T:Since the Earth's crust solidified billions of years ago