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G107 Exam 3
Gerald Ruth's study guide
119
Geography
Undergraduate 1
12/08/2014

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Cards

Term
Earth's Structure
Definition
Solid inner core, molten outer core, rock mantle and crust.
Term
What is the solid inner core made out of?
Definition
iron and nickle
Term
Moho
Definition
The boundary between the crust and mantle
Term
Litho
Definition
brittle uppermost mantle and crust
Term
Asthenosphere
Definition
below uppermost mantle and is plastic like
Term
principle of isostatic balance
Definition
light color, low density and silicates + dominate
Term
Deeper crust and ocean floor rock
Definition
darker and denser silicates and manganese dominates.
Term
Highest elevation of 30,000
Definition
mount everest
Term
lowest belevation of -35000
Definition
mindinoa trench
Term
minerals
Definition
inorganic solids, crystalline in nature, + definite chemical compositions
Term
rock
Definition
more complexed; composed of mineral assemblages
Term
3 rock classes
Definition
igneous, sedimentary and metamorphic
Term
crustal landscapes are..
Definition
dominated by exposed sedimentary outcrops but sedimentary least in volume
Term
ocean floors are..
Definition
dominated by extrusive igneous basalt rock.
Term
intrusive rock
Definition
gabbro
Term
continental foundations
Definition
intrusive granite
Term
extrusive
Definition
rhyolite
Term
what rock dominates?
Definition
sedimentary
Term
intermediate forms
Definition
intrusive igneous diorite and extrusive andesite
Term
examples of sedimentary rock
Definition
shale, limestone, sandstone + conglomerate
Term
metamorphosed rock
Definition
either sedimentary or igneous formed under heat and pressure
Term
metamorphosed rock example
Definition
shale>slate and limestone>marble
Term
fossil fuels
Definition
coal, oil, natural gas, relates to some layers of sedimentary rock
Term
deep mining coal
Definition
is costly, low harvest/miner,silicosis, explosions, and toxic gases
Term
area striping coal
Definition
is cheap, hi harvest/miner, less accidents, less disease, slight environmental harm
Term
contour strip
Definition
not as cheap as area strip, hi harvest/miner, some accidents, no disease, great environmental harm.
Term
what are plutonic rock forms
Definition
solidified intrusive magmas
Term
another name for plutonic rock forms
Definition
batholiths, stock, dikes, sills, laccoliths
Term
rock state of southern indiana
Definition
maturely dissected plateu with hard sedimentary rock.
Term
southern indiana consists of..
Definition
hilla, weak sedimentary rock and valleys
Term
karst lands
Definition
CAVES, SINKHOLES, underground rovers. jointed limestone rock from bloomington to corydon
Term
knobs are..
Definition
an area of low hills, about 500' releif
Term
new albany is..
Definition
full of shales and low rolling plains
Term
who is wegener
Definition
author of continental drift
Term
what did the continental draft theory lack?
Definition
mechanism for continental movement
Term
which way does the internal heat of earth's core radiate
Definition
upward
Term
what is the continental drift now called
Definition
plate tectonics
Term
Examples of a plate tectonic
Definition
mid-atlantic ridge
Term
OP + CP
Definition
pacific fire ring subduction
Term
CP + CP
Definition
Spreading along parellel faults producing rifting and terrancing in east Africa
Term
hot spot activity
Definition
haawaiian islands and their move northwestward on pacific ocean plate
Term
when did paleomagnic research start?
Definition
1950s
Term
Paleomagnism did what
Definition
proof of plate movement by earthquakes, seismograph,printed seismograph, seisomometers, richter and moment magnitudes
Term
Primary waves are also known as
Definition
p=punch
Term
Secondary waves are also known as
Definition
s=swing
Term
p-s finds lag time....
Definition
distance to epicen
Term
secondary lag time cannot what?
Definition
penetrate liquid molten outer core.
Term
local waves produce...
Definition
roll and twist
Term
what is #1 region?
Definition
earthquakes and explosive volcanoes > pacific fire ring
Term
what is #2 region?
Definition
mediterranean-Himalayan axis
Term
what is #3 region?
Definition
east african rift zone of parallel faulting
Term
what is diastrophism
Definition
involves folding and faulting processes
Term
what are anticlines
Definition
upfolds
Term
what are syclines
Definition
down folds
Term
what do eroded surfaces analyze with?
Definition
index fossils
Term
What are normal faults?
Definition
expansion processes involving zones of rock weakness
Term
what are reverse faults?
Definition
compression precesses involving zones of rock weakness, give over hang cliffs
Term
what are thrust faults?
Definition
low angled zones of rock weakness
Term
what are the volcano activity classes?
Definition
active, dormant + extinct
Term
What are the profile classes?
Definition
cones and huge shields.
Term
what are stratovolcanoes
Definition
large explosive high viscosty lavas, varies of eruption, bombs, ash, + lahars
Term
what is weathering physical?
Definition
disintergration
Term
what is weathering chemical?
Definition
decomposition
Term
physical examples
Definition
plant wedge, frost wedge, salt crystal growth, exfoiliation by unloading or temp change
Term
chemical examples
Definition
oxidation, hydration, hydrolosis, carbonation
Term
what is mass wasting caused by gravity acting on weather?
Definition
landslides, rockfalls, solicluct, etc
Term
what is the hydrologic cycle?
Definition
about 70% of the precipiation that falls on landscapes is evapotranspirated, 30% that falls on landscapes runs off thorough streams or temporarily stored as groundwater
Term
what do you use soil water for?
Definition
used by crops that can wildly fluctuate
Term
what is a water table
Definition
boundary between saturated zone and unsaturated zones of ground water
Term
what decreases as one progresses from the east coast to the Rocky Mountains?
Definition
water tables
Term
what are aquifers?
Definition
rock layers that are either or both jointed and prorous in nature
Term
what do aquicludes reject?
Definition
water
Term
what can aquicludes produce?
Definition
free flowing artesian springs and wells
Term
what is soft water?
Definition
relates to rock types thst dissovle
Term
what is hard water?
Definition
relates to rock types that don't dissovle
Term
what do grass covers do?
Definition
they can either stop or easily slow the process, purple corwn vetch
Term
what do profiles of humid landscapes vs arid landscapes do
Definition
differ markedly
Term
what is the slope of landscape measures by?
Definition
degrees or %s
Term
what are gradients of streams measures by>?
Definition
feet per mile
Term
what are the rocky mountains of united states?
Definition
continental divide
Term
what are the appalachian mountains of united states
Definition
secondary continental divide
Term
stream terminology
Definition
divide or interflueve, basin or watershed, source or headwaters
Term
what are confluences?
Definition
head of navigation
Term
order of a stream
Definition
narrowing of channel, left vs right bank, mouth, delta, distrib
Term
why are central surface areas of rivers flow fastest?
Definition
because of less friction
Term
why are rivers considered hydrolysis saws?
Definition
because of stones and rocks cut because of traction
Term
what are course particles and small stones bounced by?
Definition
saltation process, clay moves by suspension
Term
what decreases as rivers age?
Definition
it's gradient and its velocity
Term
aging of rivers and valleys
Definition
youth falls, rapids present if rock density varies maturity, meandering from ecess energy, stream slows, valley goes from a v to u shape.
Term
how do flood plains age?
Definition
begins in maturity and widens and meanders may become server in old age
Term
what is the colorado river an example of?
Definition
mature stream in a youthful valley
Term
what causes general flooding
Definition
extended rain periods
Term
what is flash flooding
Definition
stalled storms in upper tributaries servere where land is steep and vegetation is sparse.
Term
where can water erosion be severe?
Definition
dry areas if a long period of time is involved.
Term
what are arid areas?
Definition
relatively flat, and are vulernable to wind eros-reduction frict and scanty vegetation
Term
how are most desert surfaces?
Definition
rocky or stony because of deflation of the landscape
Term
what does sand pile into?
Definition
dunes
Term
what are clays
Definition
wind blown by suspension
Term
What is found at the base of a mountain?
Definition
alluvial fans
Term
what does the merging of alluvial fans produce?
Definition
bajadas that typically have good soils
Term
great dust bowl
Definition
southern US great plains > 28'-42' dry, high winds, overgraz, plow up steppe for wheat
Term
where are the high great plains
Definition
w of 100 degree w
Term
what is loess
Definition
wind driven fine clays and some coarse textures when anchored very fertile
Term
what are plateaus
Definition
elevated table land plains, they can be found anywhere
Term
how do plateaus get dissected
Definition
through differential weathering processes > hills and valleys in humidity
Term
what can you find in arid areas
Definition
mesas, buttes, and pinnacle forms
Term
what is an erosional plain?
Definition
peneplain
Term
what does desertification relate to?
Definition
semi-arid areas that become desert like
Term
what can you attribute to desertification
Definition
long term droughts and animals leveling vegetation
Term
What is a Shel
Definition
Semi-arid area south of the Sahara
Term
How long is the earth believed to be in existence?
Definition
4.5 billion years
Term
What is the Pre-cambrian time?
Definition
before the fossil
Term
The Middle Era, or Mesozoic consists of
Definition
Large Reptiles/dinosaurs
Term
Cenozoic times are
Definition
Current and prolific
Term
Continental glaciation
Definition
relates to global chilling and the lowering of sea levels
Term
Inter-glacial periods were....
Definition
randomly warm segments.
Term
Moraines are
Definition
Linear features of glacier debris
Term
What percent of earth's water is accounted by glacier?
Definition
2+
Term
What creates tides?
Definition
Gravitation of earth sun and moon
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