Wegener made several observations that supported this theory; such as, fossil evidence and matching coastlines. Despite all the evidence Wegener had suggesting the continents were once together, he could not describe how or why they would move apart, and many scientists dismissed his theory. Wegener’s theory received the support it needed during the 1960s when scientists discovered seafloor spreading. Scientists were able to use a new technology called echo sounding to find ocean features such as trenches, seamount chains (mountains on the seafloor), and mid-ocean ridges.
