Geomorph Final
Terms
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- Disintegration of rock due to volume changes associated with a reduction in pressure as a result of rock that is brought to the surface.
- Unloading
- A system which processes counteract external changes to the system and stabilize the system by making adjustments within itself
- Negative feedback system
- Mass movement characterized by a concave up sliding plane and tension cracks
- slump
- volcanic mudflow
- lahar
- Occurs when driving forces are greater than resisting forces
- mass wasting
- Landforms are created by the interplay of these three things:
- Driving forces, resistant framework, time
- transportation of weathered material
- erosion
- geomorphic feature characterized by rocks that fall and peel off like and oinion.
- exfoliation dome
- wetting and drying of rock is very effective for the weathering of
- shale
- most fundamental form of chemical weathering
- dissolution
- direction a slope faces with respect to the sun
- aspect
- slow downslope movement of material
- creep
- According to Schumm, the meandering wavelength is dependent on...
- discharge and %sand silt on riverbanks
- two ways a stream capture can occur
- intercision and abstraction
- the least susceptable mineral to chemical and physical weathering on earth's surface.
- quartz
- Occur mostly in dry, hot settings
- inselburgs
- fluvial load where material is dissolved in solution
- dissolved load
- bedload where grains "hop" along the bottom of the riverbed
- saltation
- mode of transport that tension on the surface water helps in
- floatation
- way most fine grained material is transported in a river
- suspended load
- bedload where grains "roll" along the riverbottom
- traction
- What is an olgive
- alternations of light and dark areas on a photo. They represent swells and ridges. Ridges form in the summer and swells in the winter.
- the melting and refreezing of ice due to pressure
- regelation
- Climax of the Wisconsin glaciation
- 20ka
- small dome-shaped hill of ice that is cored with ice
- pingo
- wind-blown silt
- loess
- Tower and cockpit karst form in this kind of climate
- tropical
- compound sinkholes
- uvalda
- 3 processes acting on shorelines
- tides, waves, currents
- oscillation in lake level
- seiche
- recrystalized snow intermediate between snow and glacial ice
- firn
- stream that flows into a karst feature underground
- disappearing stream
- uplift associated with freezing groundwaters
- frost heave
- glaciers can erode in several different ways, name 2
- plucking and abrasion
- debris accumulated at the terminus of a glacier
- end moraine
- multiple end moraines formed as a glacier successively retreats
- recessional moraine
- linear ridges of till accumnulated along valley walls
- lateral moraines
- fomred as lateral moraines are caught between two tributary glaciers
- medial moraines
- till-covered areas of low relief lacking ridges
- ground moraines
- stable most interior portion of a continent with low relief
- craton
- craton made of very old igneous rock
- shield
- thin veneer of sedimentary rocks on top of the shield craton
- stable platform
- What part of the continent is typically the most unstable and has the most relief?
- the edges
- shallow portions of the ocean that are underlied by continental crust
- shelf
- if erosion is < uplift _______ is formed
- anticlinal ridges
- erosion of the underlying softer sediment causes overlying more resistant sediment to fall off as boulders
- basal sapping
- streams move readily through resistant strate until it hits less resistant rock changing the stream flow
- homoclinal shifting
- more resistant rock from homoclinal shifting
- homoclinal ridges
- resistant rocks with a gentle dip
- cuestas
- resistant rocks with a steep dip
- hogbacks