Why was wegener's idea of continental drift rejected? it implied that the continents would have plowed their way through weaker oceanic crust, like a boat cutting through a thin layer of sea ice?

Alfred Wegener's idea of continental drift was rejected mainly because at that time, he could not explain the forces that caused the continents to drift. During this time, scientists believed that the earth was a solid and immovable object. He proposed it could be the centrifugal force caused by the Earth's rotation or the gravitational pull of the sun and the moon but both were immediately rejected. 

This would be an open primary. a closed primary people can vote only prior to election day if the party if they are registered. independent voters can not participate. there is not a wide-open primary, but there is a semi-open primary.

Answer// dinosaurs emerged during mesozoic era;