section 4 ch. 8 vocab Flashcards
amount of sediment a river can carry
load
very small particles (minerals) dissolved in water
solution
clay, silt, and fine sands are kept from settling in the water which makes the water look muddy
suspension
sediments which roll along the bottom of the river because they’re too heavy to be carried
bed load
volume of water which passes a point in a given amount of time (measured in m to the third power/s)
discharge
fast moving water, rapids, waterfalls, straight sections of river
immature river
slower moving water, meanders, oxbow lakes
mature river
Large mass of ice that moves over land slowly
glacier
covers an entire continent near the poles.
They move outward from the center.
Cover Antarctica and much of Greenland
continental glacier
covers the floor of a valley between 2 mountains
Smaller than continental glaciers but very long
Can move down the valley at a rate of several centimeters to meters per day.
Form when more snow falls than melts
valley glacier
when a valley glacier flows several kilometers per year
surge
picking up rocks as the glacier moves over land
plucking
grinding away at rock
abrasion
long, parallel scratches in the bedrock caused by the rock carried by the glacier
striations
a semicircular basin formed at the head of the glacier formed by frost action
cirques
a sharp ridge between two cirques
arete
formed in an area with many cirques; it looks like a pyramid- shaped peak
horn
a U-shaped valley
glacial trough
small mountain lake
tarn
formed when a tributary glacial valley is eroded by the main glacier
hanging valley
will form when a river develops in a hanging trough
hanging valley waterfall
a mixture of sediment left by a glacier on the surface (clay, silt, sand, gravel, or boulders)
till
ridge of sediment along the sides of the glacier
lateral moraine
ridge of sediment along the center of the glacier
medial moraine
ridge of sediment pushed out in front of the glacier
end moraine (terminal moraine)
fine-grained, silt-sized particles of rock
rock flour
till-covered areas with irregular topography and no ridges, often forming gently rolling hills or plains
ground moraine
large boulders transported and deposited by a glacier
erratics
long, low, tear-shaped mound of till
drumlin
deposit of stratified drift in front of a glacier
outwash plain
long, winding ridge of gravel and coarse sand deposited by a glacier
esker
irregular hill or mound found in the depression created by a glacier
kames
depression in a glacial outwash plain
kettle (lakes)
a small narrow glacier that moves from a high elevation to a low elevation
alpine glacier/valley glacier
the largest glaciers that moves outward from a central point
continental glacier
large mass of ice and snow that slowly moves in water
iceberg