Transcript Landforms Powerpoint

LANDFORMS
Loess is a deposit of silt or material which is usually yellowish
or brown in color and consisting of tiny mineral particles brought
by wind to the places where they now lie. It is a product of past
glacial activity in an area. It is a sedimentary deposit of mineral
particles which are finer than sand but coarser than dust or clay,
deposited by the wind. Loess is a type of silt which forms fertile
topsoil in some parts of the world. Loess deposits are usually
a few meters thick. One of the key characteristics of these
deposits is the ‘cat steps'. The soil has few clay particles to hold
it together. It is composed mainly of quartz crystals which slide
easily against each other, and is therefore very subject to erosion.
A canyon or gorge is a deep valley often carved from the Earth by a
river. Most canyons originate by a process of long-time erosion from
a plateau level, with a stream gradually carving out its valley. The cliffs
form because harder rock strata that are resistant to erosion and
weathering remain exposed on the valley walls. Canyons are much
more common in dry, hot areas than in wetter areas because weathering
has a lesser effect in arid zones. Canyons' walls are often formed of
resistant sandstone.
A lake is a body of water surrounded by land.
An island is a relatively small body of land surrounded entirely
by water.
An archipelago is a landform which consists of a chain or cluster of
islands. Archipelagoes usually occur in the open sea; less commonly, a
large land mass may neighbour them. Archipelagoes are often volcanic,
forming along mid-ocean ridges. Erosion and deposition are also
involved in their construction.
An ocean is a body of water that covers oceanic crust.
A cliff is a vertical, or nearly vertical exposure of rock.
A coast is a margin of land where land meets the sea.
A bay is a body of water that is partly enclosed by land
(and is usually smaller than a gulf).
A butte is a flat-topped rock or hill formation with steep sides.
A cape is a pointed piece of land that sticks out into a sea, ocean, lake, or
river.
A cape is a pointed piece of land that sticks out into a sea,
ocean, lake, or river.
An estuary is where a river meets the sea or ocean.
A fjord is a long, narrow sea inlet that is bordered by steep cliffs.
An isthmus is a narrow strip of land connecting two larger landmasses.
An isthmus has water on two sides.
Bibliography
All information was found at
www.wikipedia.com