On a weather map, which type of front is shown by a line with semicircles extending from one side

Importance of a screensaver in a computer

In 1915 the german geologist and meteorologist alfred wegener first proposed the theory of continental drift, which states that parts of the earth's crust slowly drift atop a liquid core. the fossil record supports and gives credibility to the theories of continental drift and plate tectonics.

Which features do all new rocks formed near oceanic ridge share? pillow shaped stripes pattern provide evidence to seafloor spreading made from molten material iron oriented in same direction