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Story in the Rock

Story in the Rock. By : Kelly Vogt, John Dickhaus , and Alex Arnold. Rock Cycle/Rock Types. The rock cycle starts with magma inside the earth.

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Story in the Rock

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  1. Story in the Rock By : Kelly Vogt, John Dickhaus, and Alex Arnold

  2. Rock Cycle/Rock Types • The rock cycle starts with magma inside the earth. • The magma erupts out of cracks in the crust through volcanoes. After the magma has erupted and reached earth’s surface it becomes lava (which later cools and becomes igneous rock). • Igneous rock is formed by cooling lava. • Sedimentary rock is formed by sediments being compressed together by other rocks. • Metamorphic rocks are formed by sedimentary rocks that have added heat and pressure.

  3. Weathering • Weathering is the process of rocks breaking down. Chemically and mechanically. • Chemical weathering is only from inside and no movement is involved. Chemicals inside of the rock break down and cause the rock to shatter or break., • Mechanical weathering has to do with the outside of the rock. For instance, say that some water got in between a crack inside of the rock… then it froze during night or at some point. That would cause the rock to break. Weathering in period does not break rocks by movement.

  4. Erosion • Erosion is the breaking down of rock by movement. Water, wind, and ice are all the agents of erosion. • Sheet erosion is where water flows down a mountain or hill in sheets, instead of individual lines. • An example or erosion is how the Grand Canyon was formed by the Colorado river.

  5. Geologic Time Scale • The geologic time scale records how old or how new a layer of earth is based on how deep in the earth they are. • For example: A layer of the earth that is close to the mantle is very old as a layer that is part of the crust would be very recent(new). • Just a one layer difference could result in a large span of age difference when the layer was created.

  6. Fossils • Fossils are usually found inside of Igneous rocks. • Fossils are organisms that died and their remains where stuck in rock . • Usually Igneous rocks is where fossils are found. • Scientists called paleiologhist find fossils and put them together to find species of animals. • Fossils are also used as fossil fuels. But this is a nonrenewable source.

  7. Superposition • The Law of Superposition states that the youngest layers of sediment are at the top of the sequence and the older layers on the bottom. • Newer layers are deposited over older layers.

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