2. According to the hypothesis of continental drift, continents have moved slowly to their current locations. Theory of continental was purposed by alferedwegner in (1912)
3.
4. Mechanism for Plate Tectonics Seafloor Spreading provided insight to the mechanism for how the continents moved. The magma which pushes up at the mid-ocean ridge provides the new land pushing the plates, and the subduction zones gobble up the land on the other side of the plates. The mechanism was convection currents!
6. About 225 million years ago , nearly all the land was united in one large land callled Pangaea
7. Pangaea about 200 million years ago, before it began breaking up. The southern portion of Pangaea Gondwana, and the northern portion Laurasia.
8. The continents about 70 million years ago. Notice that the breakup of Pangaea formed the Atlantic Ocean. India’s eventual collision with Eurasia would form the Himalayan Mountains
9.
10. The position of the continents today. The continents are still slowly moving, at about the speed your fingernails grow. Satellite measurements have confirmed that every year the Atlantic Ocean gets a few inches wider!
11.
12.
13. Sea flour spreading As the seafloor spreads apart at a mid-ocean ridge, new seafloor is created.
27. Sequence of Rocks Same rock patterns found in South America, India, Africa, Antarctica and Australia
28. Mountains in South America and Antarctica are believed to have formed as part of the same mountain chain.
29. Ancient Climates Tropical plant remains (coal deposits) found in Antarctica Glaciations in Africa, South America, India, and Australia during the same time
30. Coal Deposits found inAntarctica. Coal requires a warm, lush climate ===> What’s Antarctica like today? ===>
32. Fossils of Glossopteris are found in Permian rocks of South Africa, India, Australia, South America, and Antarctica—all regions that were once part of Gondwanaland.
