GEOMORPHIC PROCESSES Flashcards
exogenic geomorphic processes
Weathering, mass wasting, erosion and deposition
endogenic geomorphic processes
Diastrophism and volcanism
source of endogenic forces
energy is mostly generated by radioactivity, rotational and tidal friction and primordial heat from the origin of the earth
diastrophism
All processes that move, elevate or build up
portions of the earth’s crust come under
orogenic processes involving m
ountain building through severe folding and affecting long and narrow belts of the earth’s crust
epeirogenic processes involving
uplift or warping of large parts of the earth’s crust;
diastrophism process
orogenic processes, epeirogenic processes earthquakes and plate tectonics
All exogenic geomorphic processes are
covered under a general term
, denudation.
driving force for erosion
Kinetic energy
driving force for weathering
gravitational/molecular stresses/chemical action
Chemical Weathering Processes
solution, carbonation ,hydration, oxidation and reduction
Carbonation is
the reaction of carbonate and
bicarbonate with minerals and is a common
process helping the breaking down of
feldspars and carbonate minerals
Hydration is
chemical addition of water eg. Calcium SUlphate> gypsum
physical weathering processes are caused by
thermal expansion and pressure release
In rocks like granites, smooth surfaced and rounded small to big boulders
called form due to such exfoliation.
tors
