1. Metamorphic Rocks D. Crowley, 2008

2. Metamorphic Rocks To know how metamorphic rocks are formed

3. Rocks What are the 3 types of rock? 1.Sedimentary 2.Igneous 3.Metamorphic Sedimentary – rocks with rounded grains in layers Igneous – randomly arranged interlocking crystals Metamorphic rocks…

4. Metamorphic Rocks Metamorphic rocks are formed from existing sedimentary rocks that are changed because of heat or pressure Earth movements may cause rocks to be deeply buried or squeezed - these rocks are heated and put under great pressure but they do not melt (if they melt they become igneous rocks) The minerals they contain are changed chemically, forming metamorphic rocks

5. Formation Compare the following metamorphic rocks from the sedimentary rock they formed from (we know what sedimentary rock they formed from as they have the same chemical composition)… Limestone (with bivalve fossils) Marble

6. Metamorphic Rocks Marble is formed from limestone Very high temperatures break down the shells and they form small crystals (but the rock does not melt) LimestoneMarble

7. Metamorphic Rocks Slate is formed from clay As the clay gets heated and compressed the tiny plate-like particles align in the same direction (split into sheets, great for roofing material) ClaySlate

8. Metamorphic Rocks Schist is formed from mudstone due to huge temperatures (mudstone can become slate if there is high pressure but not high temperature) New minerals such as mica form due to the huge temperatures creating layers (needs steady heat and pressure) MudstoneSchist

9. Metamorphic Example

10. Metamorphic Complete the metamorphic rocks worksheet

11. Metamorphic