LSU Geology 1001 – Flashcards
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Use your knowledge of plate boundaries to answer whether a volcano is likely or unlikely to form at the location of the red triangle.
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Unlikely
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Counter currents near the equator flow mostly:
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east-west, parallel to the equator
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Sediments in and below a dewatered area of an aquifer become compacted because:
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water pressure drops and the pore spaces are closed
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Pushing down on the sealed glass container causes
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decreased volume, pressure increases.
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Which of the following is NOT a way that plate motions can cause changes in climate?
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rapid seafloor spreading lowers sea level, exposing the continental shelves
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Use your knowledge of plate boundaries to answer whether an earthquake is likely or unlikely to occur at the location of the red circle.
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Unlikely
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Which of these four lakes could only exist if they if they received water from precipitation or runoff from the land?
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1 and 4
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Which of the following is a common setting for a spring?
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all of these
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Which area(s) on this world map is likely to have earthquakes?
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A, B, and C only
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The area marked by number 2 on this figure is a desert primarily because:
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it experiences dry, descending air in the subtropics
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For the sand dunes shown here, which was does the prevailing wind blow?
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from left to right.
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How does this desert feature form?
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wind coats the surface with material that becomes iron and manganese oxides
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When melting forms magma:
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partial melting produces a magma that is more felsic than the source
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This figure shows how sunlight strikes the earth during certain times of the year. It is summer:
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in the Northern Hemisphere
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The east Australian current is shown by the sweeping arrow flowing south along the continents eastern shoreline. Winds blowing across this current onto land are shown as a series of westward arrows. These winds:
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pick up moisture and then cause precipitation, allowing rain forests along the coast
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Which of the following statements correctly states how early crystallization affects the composition of a magma? Use the graph.
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Early crystallization causes the MgO (mafic) content to decline in the magma.
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What does the texture of this rock indicate about its cooling history? The magma cooled:
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slowly under relatively deep conditions
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The site on the accompanying figure that would most likely form a rock with large crystals is:
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A
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Which of the following sites will be most susceptible to damage from hurricanes?
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E, F, and H
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What types of plate boundaries are shown in this figure?
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divergent and transform
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Tropical rain forests are clustered near the Intertropical Convergence Zone, which is:
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a curved boundary where winds converge near the equator
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What does this texture indicate about the formation of this rock?
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The magma had abundant dissolved gas.
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On this map, a cold front is located between letters:
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B and C
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What would fossil ages from the geologic timescale and an isotopic age on the granite tell us about the age of the unconformity?
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The unconformity is older than the age assigned to the fossils.
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To create a sea breeze
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the warm air over the land rises, creating low pressure. Cool air over water sinks, creating high pressure. This creates an onshore breeze.
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Sea Surface Temperatures (SSTs) are typically warmest:
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on the western sides of oceans.
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The vertical igneous feature shown in this photograph is a:
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dike
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Pictured here is a model of how the atmosphere is heated. Which arrow represents heating of the earth's atmosphere by long wave radiation?
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infrared energy emitted by land
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Which principle of relative dating can be used at Siccar Point in Scotland to determine that the rocks below the unconformity were tilted to vertical before erosion occurred?
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Original horizontality
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Which of the following settings is most likely to have high precipitation?
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a site where two large-scale circulation patterns converge, causing air to rise and cool
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Atmospheric pressure decreases with increasing altitude due to:
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a decrease in the thickness and density of air on top
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Use this graph that relates temperature and pressure to answer this question. What is required if a rock in position B moves to position A on the graph?
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Temperature would have to decrease.
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The stages associated with continental rifting are, in order from earliest to latest:
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uplift, continental rift, narrow ocean basin, wide ocean basin
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