Completed Lab 2 Worksheet - Copy

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Lamar University *

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GEOL-342

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Geology

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Apr 3, 2024

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docx

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6

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Lab 2 Worksheet Minerals and Rocks (50 points, 50 possible answers) Name Skylah Henderson______ (-2 points if missing) Date 2/9/24_______ PDFs AND HANDWRITTEN SCANS WILL NOT BE GRADED. ANSWERS MUST BE TYPED IN. The powerpoints are your lab book. Use them, and the Mineral and Rock Identification attachments, to answer all questions in each part. Please explain everything in your own phrases and sentences. The worksheet is NOT the quiz! Use the powerpoint as you work to find your answers, or how to determine answers. This is the learning stage of the class. Humans learn by repetition, so by going over everything several times by hunting down answers, you will gain more than you think you will! Part 1 Minerals ( Use mineral box, Mineral powerpoint, and Mineral Identification Guide in the Lab powerpoint area of class ) Description of your personal sample : Include color, luster, hardness, cleavage or fracture, and special or distinguishing characteristic if any. Use the mineral and rock identification handouts in the content area. Non-observable info will take points off. Mineral Number Luster Color Hardness Streak Cleavage or Fracture Other if applicable Mineral Name 1 Metalli c Green 9 none 2 Transpare nt flourite 2 Non- metalli c tan 6 none 2 feldspar 3 metalli c Black/ sparkl e 6 black 1 hematite 4 metalli c green 7 Black fracture pyrite 5 nonme tallic Silver &whit 7 none frac quartz
e 6 nonme tallic opaqu e white 3 white 2 calcite 7 plastic siver 2 none 1 muscovit e 8 metal black 7 black 1 magnetite 9 nonme tallic white 4 white 3 alabaste 10 luster grey 1 White 1 talc 11 Luster opaqu e 3 none 3 halite 12 plastic Opaq ue pink 2 brown 2 biotite 13 metalli c black 4 black 4 graphite 14 Nonm etallic Opaq ue white 1 white 1 satin 15 Non metalli c clear 1 none 1 selenite 1. Between hematite and magnetite, which one has a red/brown streak? Between hematite and magnetite, the one with the red streak is hematite, magnetite has a black streak. 2. Which of the following images is potassium feldspar and which is plagioclase feldspar? Explain how you can tell. a. Plagioclase feldspar
b. answer: potassium b. Explain: potassium feldspar because it is opaque with 2 directions that are 90 degrees. 3. Which of your samples in the box left dark smudges on your fingers? a. Graphite, magnetic, and pyrite 4. Compare your samples of quartz and calcite. What is similar and what is different? a. Similar: luster and color b. Different: hardness, streaks, and clevages Part 2 Igneous Rocks (Use rock box, Igneous rocks powerpoint, and Rock Identification Guide in the Lab powerpoint area of class) **Used to be two boxes each labeled 1-15, switching to single box labeled 1-30. Minerals are samples 1-15, rocks are samples 16-30. Rock Sample Number Texture Composition Other Observations if applicable Rock Name 1 (16) smooth Felsic glassy Obsidian 2 (17) Rough Felsic grey spots Granite 3 (18) rough mafic air bubbles basalt
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