Randoms Flashcards
(23 cards)
What is chinook
Dry, warm wind found on the leeward (east) side of the Rocky Mountains (between BC and Alberta)
Caused by loss of moisture in the air due to orographic precipitation
What is the lithosphere
The outer solid part of the earth includes the crust and uppermost mantle
What is the core and it’s two parts?
Inner core
- about 1400km from the centre out
- solid nickel and iron
- high pressure and temp 10000 degrees c
Outer core
- 2000-2400km thick
- liquid composed of mostly iron
- temp 2000-6500 degrees
The inner mantle
- Also called the mesosphere
- 1900km thick
- gets increasingly rigid outwards
- composed of silicon, manganese and iron oxides
Outer mantle
- 900km thick
- semi plastic
- bottom portion called the asthenosphere
- source of lava and magma coming to the surface
- contains “mohorovicic break” which is the area between mantle and crust
Oceanic crust
- 7-10km thick
- Age of less than 200 million years
- Composed of silica (sand), iron and magnesium
- referred to as “SIMA”
Continental crust
- 40km think
- older than 1500 million years
- composed of silica and aluminum
- region of plate tectonics and continental drift
Five types of volcanoes
Basalt plateau Shield Cinder come Composite Caldera
P waves
P stands for primary waves
Fastest wave
Travels deep below the surface of the earth
Compression waves
S waves
Second fast wave
Travel deep below the surface of earth
Shear wave (side to side)
L wave
Surface wave
Slowest most damaging
Moves over the surface of the earth like and ocean wave
Causes the lifting of Rock at surface
Karst topography
Areas of the world with feature defined by the erosion of limestone bedrock
- the erosion of limestone by water occurs through a basic chemical reaction
- water and limestone for a mild acid that erodes limestone which is chemical weathering
Glacier features (cirque)
Bowl shaped valley created when ice moves out from an area
Glacier feature (horns)
Pyramid like peaks formed from Several cirques
Glacier features (Aretes)
ridges firmed from two back to back cirques
Glacier features (tarn)
Small lake found within a cirque
Moraines
Deposits of material picked up and carried by ice then deposited
Material is know as till
- lateral- alongside the glacier
- terminal is at the end
Continental glacier features (erratic)
Boulders lifted by ice
Continental glacier features (Drumlins)
Small hills of sediment formed from ice re-advancing over at existing Moraine. Tell is deposited as glaciers cannot carry that much settlement/material
Continental glacier features (striations)
Scraping in rocks surface
Continental glacier feature (kettle lakes)
Small lakes left when large chunks of ice break off and melt
Continental glacier features (esker)
remnant I’d under-glacier stream
Continental glacier features ( outwash plain)
Silly and till at the foot of a glacier
