Shared Flashcard Set

Details

Final Exam
dun dun dUN.
54
Geology
Undergraduate 3
12/07/2011
Click here to study/print these flashcards.

Create your own flash cards! Sign up here.

Additional Geology Flashcards

 

 

Cards

Term
fiord
 Definition
drowned glacier valley
Term
Ice Age sea level ft.
 Definition
350 ft lower
Term
More weight the more___
 Definition
erosion
Term
glacier troughs
 Definition
u shaped
Term
hanging valley Yosemeite
 Definition
tributary smaller valley glaciers cannot erode as deep as the Piedmont glacier that flow into; thus after glaciation the smaller valleys are high abobe the main valley; this leads to waterfalls in yosemite
Term
cirques
 Definition
bowled shaped head of a former valley galcier
Term
ski resorts are commonly built in
 Definition
cirques
Term
aretes
 Definition
narrow ridge separating two glacial valleys
Term
horn
 Definition
peaked mountains from erosion by former glaciers radiating off the top
Term
tarn
 Definition
lake at the head of a former glacier; in the cirque
Term
paternoster lakes
 Definition
series of lakes going down the glacial-carved valley; formed by differential erosion or damning by recessional moraines.
Term
lateral moraines
 Definition
side of glacier against valley wall from freeze-thaw and mass-wasting
Term
medial moraine
 Definition
from two glaciers joining; combination of lateral moraines
Term
deposits from glaciation are separated as....
 Definition
sorted and non-sorted
Term
glacial plucking
 Definition
erodes sides and heads of teh valleys; form steep cirques. Picks up and incorporates the rock in the ice; freeze/
Term
abrasian
 Definition
physical grinding of rock in ice against the valley; enables glaciers to carve deep valleys
Term
rock flour
 Definition
fine pulverized rock; cause streams flowing out from a glacier to be milky; when dried and blown away the powder is called loess
Term
loess
 Definition
blown away rock flour powder
Term
Mt. Reneir
 Definition
one of the only mountains that you can climb the glaciers in the aretes
Term
glaciers flow:
 Definition
internally and faster in the middle while slower along the valley walls
Term
rate of movement of glaciers
 Definition
2ft/day. slow
Term
glacial surge
 Definition
fast movement due to pressure melting at base; rates as high as 425ft/day recorded. rare
Term
zone of accumulation
 Definition
above the snowline
Term
zone of wastage. aka
 Definition
ablation below snowline.
Term
zone of fracture
 Definition
upper zone. crevasses form as glacier overrides high areas on the valley floor.
Term
types of glaciers
 Definition
valley or alpine ex. alps and alaska. piedmont glaciers; alps alaska, canadian rocikies.
Term
continental ice sheets
 Definition
greendland, antartica.
Term
karst
 Definition
slavic term meaning bare stoney groudn
Term
what is primary form of erosion in karst
 Definition
dissolution and occurs in limestone and dolomite
Term
what percent of the earth is karst
 Definition
15
Term
what percent of TN is karst
 Definition
50
Term
what is karst typified by?
 Definition
caves. solution enlarged fractures, sinking and losing streams, dry valleys, and sinkholes.
Term
Three types of sinkholes
 Definition
solution, collapse, subsidence.
Term
solution sinkholes
 Definition
most common-no cave beneath
Term
collapse
 Definition
enclosed depressions from cave roof collapse///karst windows are collapsed sinkholes with a stream running through them.
Term
subsidence
 Definition
form when an overlying cover of unconsolidated material is piped downward
Term
Is ground water in karst easily polluted and why
 Definition
Yes due to little or no filtration. nearly all springs in karst are polluted because the water is nothing but cave waterplike a surface stream.
Term
what are big problems in surface water
 Definition
giardia and cryptosporidium
Term
How many caves in TN
 Definition
7000
Term
Largest cave in the world
 Definition
Mammoth cave, ky, 300 miles
Term
Two of deepest pit caves
 Definition
TN each being about 800 ft in total depth, several pits in each one.
Term
2 categories of caves
 Definition
horizontal caves, and pit caves
Term
horizontal caves
 Definition
form just below the water table, usually have more than one level corresponding to stationary periods of base level followed by uplift or change in climate
Term
pit caves
 Definition
form above water table from the water drilling its way to the water table, forming a natural well. deepest is 256ft in tn.
Term
Long Island and Marthas Vineyard
 Definition
end moraines, termainal, recessional moraines.
Term
ground moraine or till;
 Definition
morst of what covers the mid continent of usa. unsorted.
Term
glacial ice is what color
 Definition
blue
Term
sorted:
 Definition
eskers, kettle lake deposits, outwash plains, kames
Term
firn. neve.
 Definition
recrystallized snow
Term
drumlins
 Definition
rounded teardrop shaped hills of bedrock due to the ice sheet overriding some hills; erosional remnants.
Term
holocene
 Definition
10000 bp to today
Term
pleistocene
 Definition
1.8 bp to 100000
Term
how many major ice ages
 Definition
4 during the pleistocene.
Term
ice ages from youngest to oldest
 Definition
wisconsin, illinoian, kansan, nebraskan.
Supporting users have an ad free experience!