Alfred Wegener Theory.
In the litosphere are the plate tectonics. These move forming different types of plates.There is a theroy which was proposed by Alfred Wegener.
Evidences for continental drift:
- Geographical: Fit of the continents
- Paleonthologycal: Identical fossils were located directly opposite on widely separated continents.
- Geological: Similar rock types on continents on opposite sides of the Atlantic Ocean.
Plate Tectonics Theory.( http://www.sci.csuhayward.edu/~lstrayer/geol2101/2101_Ch19_03.pdf )
Concepts of continental drift and seafloor spreading are united into a much more encompassing theory known as plate tectonics.
This is a far-reaching theory that has become the basis for viewing most geologic processes — mountain building, paleontology, volcanism, earthquakes, etc.
The Earth’s surface is composed of rigid plates known as the lithosphere. These plates overly a weaker region of the mantle known as the aesthenosphere.
There are 7 major plates and over a dozen smaller plates. Plates move slowly but continously on the order of a few cm/year.
- My students’ notebook
Nerea López Peirona