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geology
N/A
47
Geology
Undergraduate 4
10/18/2012

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Cards

Term
Sugar
Definition
organic substance even though crystalline
Term
Mercury
Definition
not a solid. Elemental mercury is liquid
Term
Glass
Definition
Not crystalline in its structure
Term
The polymorphs graphite and carbon are not the same mineral but have identical chem formulas why?
Definition
Both minerals are made of carbon but diamond has all its bonds covalent, whereas the sheets in graphite have covalent bonds within but Van der Waals bonds between them.
Term
What chemical bond is in the SiO4 tetrahedron?
Definition
Covalent
Term
What chemical bond holds the sheets if mica together?
Definition
Van der Waals
Term
What chemical bond is found in soluble mineral the halides?
Definition
ionic
Term
what chemical bond is mostly electrical conductive?
Definition
Metallic
Term
Which mineral property distinguishes dense minerals like gold from less dense ones?
Definition
Specific gravity
Term
Cleavage
Definition
Which mineral property is a function of the angle and number of planes of weakness in a crystal lattice?
Term
Silicates
Definition
Which mineral group is common in rock forming minerals?
Term
sulfides, native elements
Definition
mineral families that are common hydrothermal deposits.
Term
mafic=fe and Mg
Definition
Mafic silicates vs felsic
Term
Calcite
Definition
carbonate used in cement, lime
Term
Gypsum
Definition
sulfate used in plaster, drywall
Term
Gold, Copper, aggregate, silver
Definition
top 4 mineral resources in Nevada
Term
Anthrocite
Definition
the hightest rank/type of coal which produces the most energy per pound of fuel
Term
What year was the start of the modern oil industry  and where?
Definition
1901 Beaumont Texas
Term
Reservoir
Definition

porous rock in the subsurface where the oil has accumulated

 

Term
caprock
Definition
nonporous rock overlying the reservoir that has kept the oil from migrating elsewhere underground
Term
Salt dome
Definition
blob like deposit of salt that has risen up from deeper layer in the sedimentary rock sequence, causing surrounding rocks to be domed upward
Term
source rock
Definition
an organic rich rock that when it was deposited had lots of plant materials and algae that later got converted to oil
Term
what currently is being mined in canada for natural gas in US
Definition
tar sands from alberta
Term
gas hydrate
Definition
found in great quantities in the ocean floor and permafrost
Term
geothermal gradient
Definition
The increase in temperature with increasing depth in the earth
Term
Where and how do rocks form magma
Definition
decompression: midatlantic ridges, hot spots: hydration: subduction zones
Term
3 components in magma
Definition
melt, crystals, volatiles
Term
fractional crystallization
Definition
as magma cools minerals sequentially crystallize out following the ideal sequence shown in the Bowen reaction diagram
Term
plutonic rocks
Definition
intrusive, they cool more slowly than volcanic rocks and can be differentiated from their volcanic counterparts by having coarser phaneritic textures
Term
dike
Definition
tabular intrusions that cross cut rocks
Term
sills
Definition
tabular intrusions that form horizontally in between rock layers
Term
peridotite
Definition
an intrusive ultramafic rock that the mantle is made of
Term
quartz, muscovite, k-feldspar
Definition

have the lowest crystallization temp and will be last to form.

 

Term
fracture zones
Definition
linear features in ocean crust produced by offsers in axis of oceanic ridges
Term
polarity
Definition
over time, N and S poles have trade places and this results in magnetic anomalies.
Term
Declination
Definition
indicates a rock or continent has been rotated since it formed. In rocks it is frozen in place when the rock forms.
Term
what forces drive plate tectonics in the mantle
Definition
Convection
Term
what forces drive plate tectonics in lithosphere?
Definition
slab pull, ridge push, slab suction.
Term
Convergent margins with subduction zones-
Definition
has deep focus earthquakes
Term
Why are mid-ocean ridge earthquakes weak and shallow
Definition
lithosphere is thin and weak
Term
paleomagnetism
Definition
a record preserved in rocks that indicater the orientation of the magnetic field
Term
magnetic anomoly
Definition
difference between the expected strength of the Earth's main dipole field at a certain location and the actual measured strength of the magnetic field at that location.
Term
lithosphere
Definition
consists of the crust plus the top part of the upper mantle
Term
asthenosphere
Definition
composed of warmer mantle that can flow slowly when acted on by force
Term
wadati-benioff zone
Definition
the belt of earthquakes in a downgoing plate
Term
continental rift
Definition
linear belt in which continental lithosphere undergoes rifting or pulls apart
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