The Rock Cycle: A Journey Through Igneous Rocks

1. The Rock Cycle By Pete Walker

2. How Igneous rocks are formed • I started out in a magma chamber way below earth’s surface • It was so hot in there that I melted into magma This is where I melted

3. My adventure to earth • I started to head up through a dike • My girlfriend was really sad that I left her • I then entered a pluton

4. Into the volcano • I then went up through another dike into the volcano • I met a new friend on the way up • It was really awesome I went all the way up through this cool thing with my new friend

5. Out of the volcano • I shot out of the volcano and said by to my new friend • The air outside the volcano was very cool compared to the magma chamber

6. Lava • I then turned into lava and was in a lava flow • I flowed down the volcano and met some of my old friends again

7. Extrusive Igneous rock • I cooled and formed into a big black rock • My friends were jealous of how good looking I was

8. Sedimentary Rock • Weathering and erosion is causing me to turn into Sedimentary rock

9. Sedimentary rock • I was deposited in layers called strata

10. Clastic Sedimentary Rock • I’m a clastic sedimentary rock • I formed from consolidation of sand derived from weathering and breakdown

11. Sedimentary rocks • Some of my friends contain really cool fossils in them

12. Chemical Sedimentary rock • One of my old friends from the magma chamber is now a chemical sedimentary rock • He formed when minerals in solution became oversaturated and precipitated

13. Organic Sedimentary Rock • My friend from the dike turned into an organic sedimentary rock • He contains materials generated by living organisms and includes carbonate minerals created by organisms such as coral

14. Sedimentary rock • Allsedimentary rocks are lithified into some collective mass • Lithification is any process that turns raw rock sediment into consolidated sedimentary rock

15. Tertiary Sedimentary Rock • Tertiary sedimentary rocks have tilted beds

16. Forming Into Metamorphic Rock • Metamorphic rock is rock that has been altered by heat and pressure

17. Metamorphic Rock • Metamorphic rocks can be formed by tectonic processes such as continental collisions which cause horizontal pressure, friction and distortion

18. Contact Metamorphism • Contact metamorphism happens when rock comes in contact with magma

19. Regional Metamorphism • Regional metamorphism is a large amount of metamorphism over a broad geographic area Regional Metamorphism

20. Foliation • Foliation is the layering within metamorphic rocks • Foliation occurs when rock is being compressed along one axis during crystallization

21. Foliated and Non-foliated Rock • Foliated Rock is a product of differential stress that deforms the rock in one plane, sometimes creating a plane of cleavage • Non-foliated rock does not have planar patterns of stress

22. Recrystallization • Recrystallization is the change in particular size of a rock during the process of metamorphism

23. Back to magma • I started to melt back into magma again • I met some of my old friends Metamorphic Rock

24. In the Magma Chamber • I didn’t want to go to the cold earth again • I started to go up a dike

25. Intrusive Igneous Rock • I started getting surrounded by pre-existing rock • It was really scary

26. Intrusive Igneous Rock • I started cooling and solidifying slowly • I wasn’t so scared anymore

27. Intrusive Igneous Rock • As a result I am now course grained • It’s really cool to be an Intrusive Igneous rock

28. Batholiths and Laccoliths • One of my old friends was in the core of a major mountain range • He got exposed by erosion and was a part of a huge batholith

29. Thanks for listening!