1-25-13
Alfred Wegener was responsible for the continental drift theory. He used plant and animal fossils and rock evidence to piece together Pangea.
1-30-13
Alfred Wegener used evidence such as fossils and rocks to piece together Pangea. He also used continental shelfs to determine how they fit together. Evidence previously collected did not match his. Mountain ranges were the same as across the world. Also glacial deposits are found in deserts and life was found in the most desolate cold places.
1-31-13
Once the sea floor was mapped we were able to connect the continental shelfs, ridges, and trenches together and this essentially contributed to Plate Tectonics.
2-12-13
- A continental v oceanic crust convergent plate boundary causes volcanic mountains.
- Subduction occurs when a heavier plate goes under a less dense plates. This causes a subduction zone.
2-14-13
At the oceanic v oceanic convergent boundary there is an island arc forming. At the divergent plate boundary there is an underwater mountain range forming. At the oceanic v continental convergent subduction there are coastal volcanoes. And the plate is being destroyed.
2-15-13
1. At point one there are oceanic crust and continental crust converging forming subduction.
2. At point two there are convection currents in the asthenosphere.
3. At point nine subduction is occurring.
4. At point thirteen volcanic mountains are forming.
5. At point ten the plate is being destroyed.
6. At point eight a trench is forming.
7. At point six the seafloor is spreading, a valley is being formed and ridges are also forming.
2. At point two there are convection currents in the asthenosphere.
3. At point nine subduction is occurring.
4. At point thirteen volcanic mountains are forming.
5. At point ten the plate is being destroyed.
6. At point eight a trench is forming.
7. At point six the seafloor is spreading, a valley is being formed and ridges are also forming.
2-19-13
At point a a divergent plate boundary is forming which is then forming a ridge and a valley. At B there is there is oceanic v continental plate boundary. This is forming volcanic mountains on the land and a trench in the ocean. At point C the plate is sub-ducting and being recycled by the asthenosphere. At point D there are volcanoes forming which is caused by oceanic v oceanic convergent subducting boundary.
2-20-13
- A valley is forming between the peaks.
- The peak is 200-210 units