Lab 2 Geology

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Lab Module 2: Mineral and Rock Identification Lab; Geologic Time (130 points)

Part 1: Mineral and Rock Identification

In this part of the lab, you will describe the minerals and rocks included in your Home Training Tools boxes. You will create a list of the minerals and rocks identified by number, and record your personal observations of your samples. For the minerals, you should make note of the luster and color, hardness, cleavage or fracture, streak, and if it has any special characteristics, as described in the Interactive Lecture and your textbook. For the rocks, identify the texture, composition and a description of grains or crystal, or observable minerals present, also described in the interactive lecture and your textbook. There are 15 minerals, and 15 rocks, 5 of each rock type.

GEO101C Lab Rubric - Module 2 Criteria Exceeds Expectation Content, Research, and Analysis 9-10 Points Requirements Includes all of the required components, as specified in the assignment. 9-10 Points Content Demonstrates substantial and extensive knowledge of the materials, with no errors or major omissions. 9-10 Points Critical Analysis Provides a strong critical analysis and interpretation of the information given. Total points possible = 30 Meets Expectation Below Expectation 6-8 Points Includes most of the required components, as specified in the assignment. 6-8 Points Demonstrates adequate knowledge of the materials; may include some minor errors or omissions. 6-8 Points Some significant but not major errors or omissions in analysis and interpretation. 3-5 Points Includes some of the required components, as specified in the assignment. 3-5 Points Demonstrates fair knowledge of the materials and/or includes some major errors or omissions. 3-5 Points Major errors or omissions in analysis and interpretation. Limited Evidence 1-2 Points Includes few of the required components, as specified in the assignment. 1-2 Points Fails to demonstrate knowledge of the materials and/or includes many major errors or omissions. 1-2 Points Fails to provide critical analysis and interpretation of the information given.
Lab Module 2: Mineral and Rock Identification Lab; Geologic Time (130 points) Part 1: Mineral and Rock Identification In this part of the lab, you will describe the minerals and rocks included in your Home Training Tools boxes. You will create a list of the minerals and rocks identified by number, and record your personal observations of your samples. For the minerals, you should make note of the luster and color, hardness, cleavage or fracture, streak, and if it has any special characteristics, as described in the Interactive Lecture and your textbook. For the rocks, identify the texture, composition and a description of grains or crystal, or observable minerals present, also described in the interactive lecture and your textbook. There are 15 minerals, and 15 rocks, 5 of each rock type. 1. Fluorite 2. Feldspar – Microcline 3. Hematite 4. Pyrite 5. Milky Quartz 6. Calcite 7. Mica – Muscovite 8. Magnetite 9. Gypsum – Alabaster 10. Talc 11. Halite 12. Mica – Biotite 13. Graphite 14. Gypsum – Satin Spar 15. Gypsum – Selenite 1. Obsidian 2. Granite 3. Basalt 4. Pumice 5. Rhyolite 6. Shale 7. Calcareous Tufa 8. Sandstone 9. Conglomerate 10. Limestone 11. Slate 12. Marble 13. Quartzite 14. Gneiss 15. Schist http://www.hometrainingtools.com/mineral-study-kit http://www.hometrainingtools.com/rock-study-kit Answer the following questions: 1. 2. 3. 4. 5. 6. 7. Explain the rock cycle. What did you find the most useful property to identify your minerals? What was different about the components of your conglomerate and granite? What was similar between your limestone and marble? What was different between your sandstone and quartzite? Describe the differences between the conglomerate, sandstone, and shale. What is similar and what is different about your granite and gneiss? Part 2: Geologic time Relative dating methods: Using the diagram below, and the rules of relative dating, answer the following questions. 1. 2. 3. 4. 5. 6. Which unit was being deposited when the fault happened? Explain why the funny line between units 3 and 4 is a disconformity, and not an angular unconformity. Hypothetically, if the trees and ground at the top were covered by the ocean, and deposition resumed, what type of unconformity would be above unit 12, and why? Would unit 11 likely to be present when the fault happened? Why or why not? Explain why units 1-5 were not deposited in this position. In some areas, faults are known to act as a petroleum trap. If unit 2 has oil, and unit 3 is shale, what part of unit 2 would you drill into, above or below the fault, and why? Radiometric dating: Answer the following questions. 1. 2. 3. 4. 5. In order to ascertain useful dates on rock units to help determine the age of major events. Your mission is to date what is thought to be a very old fossil with a volcanic ash layer immediately above the fossil. We do know the fossil is at least more than 300 million years old. Should we use carbon 14 to date the fossil, or uranium 238 to date the volcanic ash layer, and why? We find samples of an igneous rock demonstrate it has been through 3 half-lives. The test element has a half-life of 300 million years. How old is the rock? If the parent isotope starts with 100 grams, but your samples yield only 6.25 grams of the parent isotope, how many half-lives have passed? What unstable isotope would be best to refine the date of bones found in a cave hearth built by humans between 20,000 and 40,000 years ago? Argue with the following: A stone tool fashioned from a chunk of obsidian yields a date of 3,000,000 years old, therefore, the tool was made by a human 3,000,000 years ago.

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Robertmariasi
School: Purdue University

Hello there,Hope everything is fine. I just wanted to tell you that I managed to finish the task regarding the rocks. I am attaching to this message a Micros...

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