It confirmed sea-floor spreading as hypothesized by Hess, and thus "continental drift," originally proposed by Alfred Wegener back in 1912.
(thus "continental drift; proposed back; T:originally) (It; confirmed; sea-floor spreading as hypothesized by Hess, and thus "continental drift) Context(It confirmed,List([0, 12))):(sea-floor; spreading; T:as hypothesized by Hess)
It confirmed,List([0, 12))
thus "continental drift It sea-floor
proposed back confirmed spreading
T:originally
sea-floor spreading as hypothesized by Hess, and thus "continental drift
T:as hypothesized by Hess