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