Week of December 14

In the beginning of the week Mr. Finley gave us an article on Alfred Wegener, which is pronounced Vegener. He asks us to summarize the article which we all did. The article was about Wegener and his theory of the continental drift. As he was reading a book he notice some organisms were the same but on different continents separated by huge oceans. He wondered how this was possible. After that he studied on and found some land forms matched up. For example: The Appalachian Mountains And the Scottish Highlands matched up identically. Wegener's theory now is known as Pangaea which is Greek for "all of the earth".Then we began to talk about the different rock types. There were three types: igneous, sedimentary, and metamorphic. Here are the following definitions:
Igneous: formed from lava, magma that cools and hardens.
EX: granite, basalt, obsidian
Sedimentary: forming from sediment that gets pressurized together.
EX: sandstone, mud stone, limestone
Metamorphic: formed from rock that undergoes both pressure and a temperature increase.
EX: marble, diamond, slate

After this we went out side to were our two tributaries met. There we found a lot of sedimentary rock and maybe even some metamorphic. There was a lot of deposition. Deposition is when rock is deposited on the sides of rivers. This is how some deltas are formed.