Laboratory 5 Syllabus
“Igneous Rocks and Volcanic Hazards”
NAME: ______________________________________________
Mods: ___________
Part 5A: pages 89-90
Read Sections: Introduction, Igneous Processes and Rocks
Carefully study the various kinds of intrusive and extrusive igneous rock bodies in figure 5.1 to
understand their shapes and origins.
After completing the reading of these two sections in the lab answer the following:
Questions:
#3 a,b,c, page 97, continues on page 105
Analyze the stereogram of Shiprock, New Mexico, in figure 5.21, refer to figure 5.1 for help.
#4 a,b, page 105
Analyze the map and photograph in figure 5.22
Calculate the area (A = L x W) of the Black Hills in South Dakota use a ruler and the map scale, if you
need help with this see your instructor.
#5 a,b, page 105
Study the geologic map of Pennsylvania (figure 5.23), refer to figure 5.1 for help identifying the igneous
bodies.
Part 5A: pages 89-91
Read Sections: Igneous Processes and Rocks, Textures of Igneous Rocks
After completing the reading of these two sections in the lab answer the following:
Question:
#1, page 97
Review the textures of rocks in figures 5.6 – 5.18.
For each rock in figure 5.19, identify the texture(s) and infer the origin of these textures
Refer to figure 5.19 and step 3 of figure 5.2 for help.
Laboratory 5 Syllabus
“Igneous Rocks and Volcanic Hazards”
Part 5A: pages 91-94
Read Sections: Mineral Composition of Igneous Rocks, Classifying Igneous Rocks
After completing the reading of these sections in the lab answer the following:
Question:
#2, page 97
Refer to the four rock samples in figure 5.20. For each sample, identify texture(s), color index, and
mineralogical composition.
Use figures 5.2 and 5.3, and use the steps listed on page 94 to classify and determine an igneous rock
name for each sample.
Part 5A: pages 105 and 103
Answer Question #7, page 105
Refer back to the four rock samples in figure 5.20 that you analyzed in Question #2.
Write a reasonable explanation of how each of these rock samples may have formed.
Include in your description:
1. The rate of cooling magma (fast, slow, or both fast and slow)
2. Magma type associated with the formation of the rock
3. A rough estimation of the temperature range of the cooling magma based on the mineral
content of the sample and the associated magma type, to do this refer back to figure 5.4
Bowen’s Reaction Series diagram on page 96.
Congratulations you are ready to move on to the Igneous Rock
Identification Lab
Part 5B: pages 105 – 108
Question # 8 a,b,c,d,e,f
Complete the table on pages 107-108 for the samples provided to you by your instructor.
Laboratory 5 Syllabus
“Igneous Rocks and Volcanic Hazards”