Landforms Flashcards
Karst topography is due to ?
Lime Stone, dolomite and gypsum rocks. As atmospheric co2 reacts with the water to form weak acid this reacts with rocks of caco3 forming giving rise to Karst topography.
Horst and grabens are seen in mountains and plateaus, due to karst topography we too get them on rocks, they are called as
Grikes and clints
Characteristics of karst topography
- Absence of surface drainage
- Formation of springs
- Appearance of sink holes(several shallow holes come together to form sink holes), uvalas(several sink holes come together to form dolines)several dolines come together to form uvalas, sallow holes(smaller depressions)
- depositional landforms : stalactites and stalagmites and pillars
Stalactites and stalagmites are seen in
Depositional land forms of karst topography
Depositional landform of karst topography are ?
Stalagmites and stalactites and pillars
Stalagmites are seen hanging or from below
From below they are grown
Stalactites are seen above or below
Above the cave, they are hanging
Depositional landforms are formed due to ?
The water containing absorbed caco3, either water got evaporated or the co2 present in it was gone
Ice age is seen in which period
Pleistocene period
What are called ice caps of the world ?
Green land and Antarctica
What is called a snow line
Are where snow is permanently found
Temperature decreases as we go up (altitude), In what measure
6.5 degrees centigrade per kilometer
The mealting go accumulated snow during day time and formation of hard granular during night is called
Neve in french and FIRN in german
Arm chair shaped or horse shoe shaped basin produced due to downward movements of glacier it is called ?
CIRQUE
DEEP vertical cracks developed at the head of the glacier, especially seen in summer, it is called
BERGSHCRUND
CRACKS developed due to when a glacier is bent on a stone
CREVASSES
Developed when two cirques or Corries cut back on adjacent sides, what is it
Aretes -> sharp knife like narrow ridges
When 3 or more Corries or cirques cut back then we get what topography
Pyramidal peaks or Angular horn
Only U shaped valleys are seen when ?
When the glaciers move we cannot see the V shaped valleys
When the main glacier flows the valley floors are of greater depth when compared to the valleys of the tributary glaciers because
Main glacier has more erosive power than the tributary glacier
Natures bulldozers are what
Glaciers
The rocks which are taken by the glacier are called
Moraines
Moraines are of 4 types name them
Medial moraines, lateral moraines, terminal moraines, end moraines