yellow cards Flashcards
where is most freshwater that is available for us?
Groundwater aquifers - mostly used for irrigation
sinkholes
when the roofs of caves collapse
Creep
the expansions/contraction of surface materials leads to very slow and gradual downhill movement of soil
Septic tank sewage disposal
-contaminated water slowly infiltrates into soil
Artesian systems
pump themselves due to water table in recharge area being at a higher elevation
consequences of water withdrawal
-compaction
-permanent lowering of permeability
-subsidence
human influence on mass wasting hazards
- weakening of slope material
-steepening of the slope
-addition of weight at the top of slopes
-humans are sculpting the surface of earth faster than natural processes
non-metallic mineral resources
- evaporate minerals
-diamonds
-stone
-aggregate
Stalacites
hanging down cave ceilings like icicles
produced by dripstone
Impermeable unit of material is?
aquitard
earth flow
when clay rich soil becomes saturated with water it behaves like a viscous fluid
how are mountain belts formed
-young divergent plate boundaries where litosphere is stretched and thinned by tensional stress
-at convergent plate boundaries (due to shortening and thickening of lithosphere
petroleum source materials
-marine organic matter pressured in anoxic
-derived from remains of marine plants
-oil prone organic matter preserved
karst
underground drainage system with caves and sinkholes
how much ice covers how much on the earth
10% of earths surface
Glaciers
slowly moving, thick mass of ice formed by accumulation, compaction, and recrystallization of snow on mountains
Stalagmites
mounds of travertine limestone growing upwards from cave floor
Columns
produced from stalacites and stalagmites connecting to form a column
Rift valley
when tectonic plates diverge it makes rift valley
debris flow
assortment of surface materials, both fine and coarse grained
mudfow
consists of loose material mixed with a large amount of water
zone of aeration
pores that contain water and air
unconfined aquifer
an aquifer that receives water directly from the land surface above
confined aquifer
aquifer that is overlain by a layer of relatively impermeable material
Influent stream
loses water to groundwater system
Effluent stream
gains water from groundwater system
two types of glaciers
icesheets and alpine glaciers
icesheets
immense sheets of ice on continental scale. Flow radially from areas of greatest ice accumulation
alpine glaciers
relatively small, occupying mountain valleys. Flow downslope
Lahars
-debris flow and mudflows specifically associated with volcanoes
-formed with large amounts of water and mixes with loose pyroclastic materials and flows downslope
Firn
-snowflakes that become smaller, thicker, and more spherical to produce firn
-becomes glacial ice when firn fuses together to form solid mass
where is majority of fresh water
glacial ice
zone of saturation
pores contain water only
drift prospecting
pioneered in Canada and it samples glacial till for indicator imerals
future hydro carbon sources?
found in deep sea and permafrost
Potash in Saskwatchewan
During the devonian period
-elk point basin became blocked from the rest of the sea
-close to equator so lots of population took place
water tower
artesian systems
glacial outwash deposits
-outwash is waterlain material
-till is directly deposited by glacial ice
horsts
elongated, high standing blocks of crust bounded by faults
fault block mountains
-the tilted edges of large crustal blocks
-rocks made by tectonic and localized stresses in earths crust
grabens
formed by the downward displacement of fault bounded blocks. Produced on either side of a rift
Ordovician
used to make brick
Silurian dolostone
used for chemical industries and in construction
devonian
construction and cement
unconventional hydrocarbon resources
oil sands: lots of bitumen
shale gas: gas trapped in source rocks
oil shale: large deposits
-requires heating to converge bitumen to oil
required to make oil trap?
-marine organic matter
-reservoir to container for petroleum
-cap rock to seal for oil trap