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26 Cards in this Set
- Front
- Back
convert 120 cm to inches
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46.8 in
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converet 9 km to feet
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29,462.4 ft
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if a mountain is rising by 2 cm per decade, what is the change in elevation after 10 million years ( in km)
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20 km
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is the north american plate covered in continental crust, oceanic, orboth
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both
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what are the three types of plate boundaries
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divergent, convergent, transofmr
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what type of boundary is the mid atlantic ridge
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divergent
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in an ocean ridge system, is the oldest oceanic crust near or far from the ridge?
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youngest near, oldest far
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what test can you use to identify calcite? quartz?
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acid test; glass scratch test
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what is the hardness of your fingernail?
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2-2.5
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what is the hardness of glass?
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6
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which mineral forms yellow cubic crystals?
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pyrite
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which mineral in dominantly magnetic
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magnetite
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which two minerals split into thin sheets? what is the difference?
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muscovite (almost clear, no streak), biotite (dark, green streak)
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what are two generalizations you can make about felsic igneous rocks?
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1. light colored. 2 low specific gravities. 3 high silica content
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what is the difference bwteen phaneritic and aphanitic texture?
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phaneritic: course grained; cool slowly, intrusivly
aphanitic: fine grained; cool rapidly, extrsuively |
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what is the major visual difference bwteen an intrsive and extrsive igneous rock?
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intrusive: form underground; course grained
extrsuive: form above ground: fine grained, can be porous |
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name the chemical sedimentary rock formed mostly from quartz
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chert (only sed. rock that scratches glass)
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name the clastic sed. rock formed from massive rounded grains
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conglomerate
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name the clastic sed. rock formed from massive angular grains
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breccia
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name the biogenic sed. rock that contains visible fossils in a fine medium grained matrix
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fossiliferous limestone
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describe low, medium, and high grade foliation in terms of visual differences
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low: no banding, not shiny, subtle layering (Slate)
medium: alignment of platy materials (shiny); (schist) high: banding (gneiss) |
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what are the three major categories of protoliths?
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alumious, quarto-feldpasthic, calcareous
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what is the most common aluminous protolith?
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shale
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name two non-foliated metamorphic rocks you have seen and the difference
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marble (calcereous), and quartzite (quarto-feldspathic)
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what is one sign that a rock has experience high grade metmorphisicm
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compositional banding, garnets
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what are three common minerals in aluminous metamorphic rocks
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muscovite, biotite, quartz, feldspar, chlorite
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