Igneous Rocks

3. Common type of volcanic glass with felsic composition
4. Small crystals, grew rapidly near the surface in the upper crust
6. Rocks made when magma and lava cool and crystallize
8. Extrusive Volcanic rock from green to black found on many volcanic islands, which is why the upper oceanic crust is also this element
9. Coarse grained intrusive rocks of high silicates that grew slowly. This also uplifts the mountains and helps with weathering
12. Has large noticeable vesicles that has is easily able to escape
15. Matrix of larger crystals in the porphyritic texture
16. Emitted from volcanos when magma reaches the Earth’s surface
17. More granitic rocks, light silicates found in continental crust
18. Openings in the rock that show the direction the lava went through. This grew rapidly enough to expand gas bubbles
19. Almost entirely dense mafic igneous rocks
20. Solidify deep beneath the Earth’s surface
21. Rocks that solidify at Earths surface
24. A resulting rock between larger crystals and smaller crystals

1. Melting of rocks in Earth’s mantle
2. Large masses of magma that grew slowly and formed larger crystals
5. Similar to granite except it is extrusive and grew faster near the surface of the Earth. Found in Yellow Stone National Park
7. Medium gray extrusive rock found in volcanic areas and is fine grained
10. Intermediate composition of granitic and basaltic composition, has at least 25 percent dark silicates
11. Made of olivine and pyroxene, main element in the upper mantle
13. Found in the oceanic crust, and is coarse grained and intrusive
14. Cooled fast, and random ions that stay in place
15. Angular blocks of glass that had fragments remaining hot enough to fuse together
22. Equivalent to Andesite, but is intrusive and the crystals are not noticeable
23. Basaltic Chemical composition, very dark and dense. Many of these are found beneath the ocean floor