Assertion: continent's position | /r/HasProperty | postulated by several scientists
Facets:
value: before alfred wegener's 1912 paper
type: TEMPORAL
Source sentences:
text: Apart from the earlier speculations mentioned in the previous section, the idea that the American continents had once formed a single landmass together with Europe and Asia before assuming their present shapes and positions was postulated by several scientists before Alfred Wegener's 1912 paper.