What are the four evidence of continental drift theory?
Alfred Wegener, in the first three decades of this century, and DuToit in the 1920s and 1930s gathered evidence that the continents had moved. They based their idea of continental drift on several lines of evidence: fit of the continents, paleoclimate indicators, truncated geologic features, and fossils.
What’s the theory of the continental drift?
Continental drift was a theory that explained how continents shift position on Earth’s surface. Set forth in 1912 by Alfred Wegener, a geophysicist and meteorologist, continental drift also explained why look-alike animal and plant fossils, and similar rock formations, are found on different continents.
Who proposed the concept of continental drift quizlet?
Alfred Wegner
Who proposed the theory of continental drift in 1915?
Alfred Lothar Wegener
What happens when a divergent boundary occurs over continental crust?
When plate divergence occurs on land, the continental crust rifts, or splits. This effectively creates a new ocean basin as the pieces of the continent move apart. In continental rifting, magma rises beneath the continent, causing it to become thinner, break, and ultimately split apart.
What landforms are created at Continental Continental convergent boundaries?
When two continental plates converge, they smash together and create mountains. The amazing Himalaya Mountains are the result of this type of convergent plate boundary. The Appalachian Mountains resulted from ancient convergence when Pangaea came together.
Why is there no volcanic activity at a Continental Continental convergent boundary?
If the two plates that meet at a convergent plate boundary both consist of continental crust, they will smash together and push upwards to create mountains. The activity at continent-continent convergences does not take place in the mantle, so there is no melting and therefore no volcanism.
What happens when two continental crust meet?
What happens when two continental plates collide? Instead, a collision between two continental plates crunches and folds the rock at the boundary, lifting it up and leading to the formation of mountains and mountain ranges.
What are created by Convergent boundaries of continental and continental crust?
At convergent plate boundaries, oceanic crust is often forced down into the mantle where it begins to melt. Magma rises into and through the other plate, solidifying into granite, the rock that makes up the continents. Thus, at convergent boundaries, continental crust is created and oceanic crust is destroyed.
What happens at Oceanic Continental convergent boundary?
When oceanic crust converges with continental crust, the denser oceanic plate plunges beneath the continental plate. This process, called subduction, occurs at the oceanic trenches. The subducting plate causes melting in the mantle above the plate. The magma rises and erupts, creating volcanoes.