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26 Cards in this Set

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