| Of course, none of these conclusions could have been reached without all these workers rejecting the idea of continental drift. |
| For example, when Wegener proposed his theory of continental drift he could not explain how continents move. |
| Quite suddenly, Wegener's theory of continental drift had the mechanism that it had previously lacked. |
| The site clarifies the often fuzzy distinction between the older theory of continental drift and its more recent reincarnation, plate tectonics. |
| No mechanism was known, for example for continental drift when it was proposed by Wegener. |
| The eminent German meterologist and father of the concept of continental drift, had used prop-driven sleds on the Ice Cap in the middle 1930s. |
