landform and formation of landscapes Flashcards
Landform
single unit that forms part of the general topography of earths surface , product of discrete set of processes
primary landform
created by tectonic plates movement and resulting in faulting folding nd warping of crust
secondary landform
landforms modified by weathering and erosion
erosion
occurs due to plates buckle and break
transport of material resulting form weathering and mass movement over potentially large distances
aggregation of landforms
product of areal expression of processes, volcanic landscape may consist of cones lava does and lava flows
denudation - degradation
processes that wear down landmasses - weathering and slope processes
weathering
disintegration or decomposition of rocks without distant removal
slope processes
spontaneous movement of material downslope due to gravity
degradation landforms
rock sea - rock fragments accumulate near original location
talus cone - rock fragments roll or fall downslope
agents of degradations nd erosion
water, ice wind waves and chemical dissolution
water
most effective and significant agent of erosion, effectiveness depends unmanly factors including slope, volume of water valley properties
glaciers
erode soil scour the surface and valley move deposit debris mountain glaciers widen and deepen valleys
wind
much less significant than water , only effective under some conditions , beaches and sandy deserts , abrasion by windburn particles
coastal waves
where land and sea contact both water and loose rocks can erode the landscape
chemical dissolution
soluble rocks such as limestone dissolve under certain climatic conditions last topography, collapse of these feature = sinkholes