Test 2 Flashcards
(34 cards)
Competence
The maximum particle size a stream can transport, determined by velocity
Capacity
The maximum load a stream can transport
Porosity
Percent of pore spaces/number of holes. Tells how much water can be stored
Permeability
Ability to transmit water & how easily it will flow through
3 parts to milankovitch cycle?
Eccentricity: the shape of the earths orbit, cycle 100,000 years.
Obliquity: the tilt of the earths axis.
Precession: the wobbling of the earths axis.
Alpine glaciers
Shape the mountains. Otherwise known as valley glaciers.
Continental glaciers
A continent is covered in ice
Erosion
the physical removal of material
Weathering
Physical or chemical breaking down of a rock
When ____ is applied to rocks, they can deform in an elastic or plastic manner, or they may rupture by brittle fracture. Affected by material, temperature, pressure, and rate.
stress
A ________ is any feature produced by deformation of rocks.
geologic structure
_____ form when rocks are compressed.
Folds
A ________ is a fracture along which rock on one side has moved relative to rock on the other side.
fault
_______ are usually caused when rocks are pulled apart.
Normal faults
_____ and ______ faults are caused by compression.
Reverse & thrust
___________ form where blocks of crust slip horizontally past each other along vertical fractures.
Strike-slip faults
A ________ is a fracture in rock where the rock has not been displaced.
joint
Mountains form when the crust thickens and rises ______.
isostatically.
Type of arc that forms when two converging plates carry oceanic crust. (volcanic)
Island arcs
If one plate carries continental crust and one plate carries oceanic crust, then a(n) _______ forms.
Andean margin
Andean margins contain rocks of _______ and sedimentary rocks deposited in a ____________.
subduction complex, forearc basin
Andean margins are dominated by _______ and ________.
granitic plutons, andesitic volcanoes.
When two plates carrying continental crust converge, an Andean margin develops first, as oceanic crust between the two continental masses is subducted. When the two continents later combine, one continent is ___________ between the other. Result examples = Himalayan Mtns
underthrust
Fold arching upward
anticline