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25 Cards in this Set
- Front
- Back
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What is the order of Mohs Hardness Scale?
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1&2-Fingernail will scratch the mineral
3 -Penny will be scratched by the mineral 6 -Iron Nail 7 -glass will be scrathched by the mineral (feel for the groove left behind in glass plate) |
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How directions of cleavage is possible and what do can you look for to tell?
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0,1,2,3,4
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What type of mineral does not have any type of cleavage?
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hexagonal prisms
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What is the name of the mineral that is strongly magnetic?
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Magnetite
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What are the only two minerals in your lab manual that are classified as metallic?
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-Pyrite
<fool's gold and Hardness 0f 6-6.5> -Galena <silvery to dull- c:3 H2.5> |
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What is the difference between Halite and Calcite? What colors do each come in?
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halite tastes like salt, but the major difference is:
-the angles between the cleavage planes *Halite-colorless to white (salty taste) *Calcite-white,tan,green,or yellow |
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What are the characteristics of a quartz?
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-it has No cleavage, hardness of 7, and can come in a variety of colors.
(not only pink and clear) |
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What are sedimentary rocks?
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pieces of things put together
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What are the two characteristics that make up a sedimentary clastic rock?
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-cementation and compaction
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What are the two characteristics that make up a non clastic sedimentary rock?
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-inorganic and organic (shells/ plant or animal fossil parts)
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What does it mean when particles are well sorted?
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rock has uniform grain size
*the longer and farther particles travel from the source, the rounder they are |
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Where do felsic rocks come from?
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the continental crust
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Where do mafic rocks come from?
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oceanic crust
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What are the terms used to to describe the color of an igneous rock?
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-felsic <light colored; quartz,plagioclase,orthoclase)
-mafic <dark colored; hornblende, amphibole,pyroxene> -intermediate <50/50 mix; dark and light> |
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What are the terms used to describe the texture of an igneous rock?
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-phaneritic <large crystals; slow cooling>
-aphaneritic <small crystals; cooled more quickly at the surface -porphyritic <mix of large/small crystals> -Glassy <no crystals; extremely fast cooling> |
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What is contact metamorphism?
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where rocks are directly touching the source of heat and are altered
*high T- low P |
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What is regional metamorphism?
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regions outside the contact area
*medium T- high P |
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Where would these rocks fall in the index minerals chart? (Muscovite& Biotite mica, Garnet, chlorite, and Staurolite)
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High grade- Staurolite
High/Medium grade- Garnet Medium/Low grade- Biotite Mica & Muscovite mica Low grade- chlorite |
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What is foliation?
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-the alignment of platy minerals due to change in T,P, or X
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What are the 4 types of foliation?
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Slaty
Phyllitic Schistosic Gneissic |
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What are the chracteristics of a slaty foliation?
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-low grade, fine grains, parallel foliation
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What are the characteristics of a phyllitic foliation?
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-low to medium grade, shiny and wavy appearance
*index minerals include biotite, muscovite |
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What are the characteristics of the schistocity foliation?
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-medium grade, larger grains, flaky,parallel alignment (garnet)
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What are the characteristics of a Gneissic folliation?
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high grade, branded light and dark minerals, coarsegrains, wavy and stretched
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What is a meteamorphic rock?
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-any rock that has been altered due to: temp., pressure, or chemical interaction
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