GEOL 1121 FINAL EXAM DOUGLAS
CROWE QUESTIONS AND
ANSWERS
El Nino events occur when - Answer- the Humboldt Current falls to upwell off the west
coast of S. America
a passive margin coast gets MOST of its sediment from - Answer- inland source
mercury is very scarce in the earth's crust, so the concentration factor necessary to
make an economic deposit is - Answer- high
the greenhouse effect refers to - Answer- the global rising of temperature due to
increased atmospheric CO2 levels
say we have a 100-year flood in 2013. What's the probability that a 100-year flood will
occur in 2014? - Answer- 1%
reaction that explains why ocean pH is becoming more acidic - Answer- CO2+H2O-
>H2CO3
skarn deposits form when - Answer- limestones get intruded by magma
dunes tend to deflate when - Answer- the amount of vegetation growing on the dune
decreases
orbital eccentricity (part of Milankovitch Cycle) refers to - Answer- the shape of the
Earth's orbit around the sun
a stream that is in equilibrium will have what shape (in profile) - Answer- concave up
pegmatites are what type of ore deposit - Answer- igneous
deforestation contributes to global warming because - Answer- fewer plants means less
CO2 removed from the atmosphere via photosynthesis
a mature stream will - Answer- have many meanders
tides are driven PRIMARILY by - Answer- the gravitational pull of the moon
, fossil fuel combustion is a principal contributor to global warming - Answer- true
epithermal deposits form - Answer- at very shallow depths beneath the Earth's surface
erosion along the outside of a bend in a river creates a cutbank, while deposition of
sediment along the inside of a bend produces a - Answer- point bar
eustatic sea level is currently - Answer- rising
in 2021, the Arctic Ice cap receded more during the summer than it did in the summer
several decades ago - Answer- true
vein deposits are often rather sheet-like in shape because they - Answer- form in and fill
fractures
global warming is a combination of - Answer- natural and human induced forcings
porphyry deposits are - Answer- very large, and low grade
stream discharge is - Answer- the amount of water that flows past some point in some
amount of time
during the most recent glacial period, the Georgia coast was - Answer- much farther
offshore than where it is today
stream capacity is a function of - Answer- discharge and sediment availability
breakwaters are constructed _______ to the shore - Answer- parallel
BIF's form - Answer- in marine basins
the US, in need be, has domestic reserves of all the mineral resources it needs to
maintain our current standard of living - Answer- false
during a major storm, most of the sand eroded from dunes will be redeposited - Answer-
in the nearshore zone
the predominant process that moves sediment in the coastal zone is - Answer-
longshore transport
the three components of the Milankovitch Theory are - Answer- orbital eccentricity,
precession, tilt
if vegetation is removed/lost from a coastal dune, the dune will likely - Answer- deflate
CROWE QUESTIONS AND
ANSWERS
El Nino events occur when - Answer- the Humboldt Current falls to upwell off the west
coast of S. America
a passive margin coast gets MOST of its sediment from - Answer- inland source
mercury is very scarce in the earth's crust, so the concentration factor necessary to
make an economic deposit is - Answer- high
the greenhouse effect refers to - Answer- the global rising of temperature due to
increased atmospheric CO2 levels
say we have a 100-year flood in 2013. What's the probability that a 100-year flood will
occur in 2014? - Answer- 1%
reaction that explains why ocean pH is becoming more acidic - Answer- CO2+H2O-
>H2CO3
skarn deposits form when - Answer- limestones get intruded by magma
dunes tend to deflate when - Answer- the amount of vegetation growing on the dune
decreases
orbital eccentricity (part of Milankovitch Cycle) refers to - Answer- the shape of the
Earth's orbit around the sun
a stream that is in equilibrium will have what shape (in profile) - Answer- concave up
pegmatites are what type of ore deposit - Answer- igneous
deforestation contributes to global warming because - Answer- fewer plants means less
CO2 removed from the atmosphere via photosynthesis
a mature stream will - Answer- have many meanders
tides are driven PRIMARILY by - Answer- the gravitational pull of the moon
, fossil fuel combustion is a principal contributor to global warming - Answer- true
epithermal deposits form - Answer- at very shallow depths beneath the Earth's surface
erosion along the outside of a bend in a river creates a cutbank, while deposition of
sediment along the inside of a bend produces a - Answer- point bar
eustatic sea level is currently - Answer- rising
in 2021, the Arctic Ice cap receded more during the summer than it did in the summer
several decades ago - Answer- true
vein deposits are often rather sheet-like in shape because they - Answer- form in and fill
fractures
global warming is a combination of - Answer- natural and human induced forcings
porphyry deposits are - Answer- very large, and low grade
stream discharge is - Answer- the amount of water that flows past some point in some
amount of time
during the most recent glacial period, the Georgia coast was - Answer- much farther
offshore than where it is today
stream capacity is a function of - Answer- discharge and sediment availability
breakwaters are constructed _______ to the shore - Answer- parallel
BIF's form - Answer- in marine basins
the US, in need be, has domestic reserves of all the mineral resources it needs to
maintain our current standard of living - Answer- false
during a major storm, most of the sand eroded from dunes will be redeposited - Answer-
in the nearshore zone
the predominant process that moves sediment in the coastal zone is - Answer-
longshore transport
the three components of the Milankovitch Theory are - Answer- orbital eccentricity,
precession, tilt
if vegetation is removed/lost from a coastal dune, the dune will likely - Answer- deflate
