Answer Happy

EXERCISE 5.6 Interpreting Igneous Cooling Histories from Textures Name: Course: Section: Date: Examine the igneous rocks provided by your instructor. Apply what you have learned about the origins of igneous textures to fill in the "cooling history" column in the study sheets at the end of the chapter. Use the following questions as a guide to your interpretation. • Which specimens cooled quickly? Which cooled slowly? • Which specimens cooled very rapidly at the Earth's surface (i.e., are extrusive)? • Which specimens cooled slowly beneath the surface (i.e., are intrusive)? • Which specimens cooled from a magma rich in gases? • Which specimens experienced more than one cooling rate?
Igneous Rock 1 Dark, fine grained
Igneous Rock 2 Light colored, coarse grained
Igneous Rock 3 Fine grained Medium colored
Igneous Rock 4 Vesicular
•Coarse grained •Dark igl
Igneous Rock 6 Vesicular
Igneous Rock 7 Glassy
Igneous Rock 8 Coarse grained and medium color
Igneous Rock 9 Fine grained and light colored
Igneous Rock 10 Coarse grained, dark