Presented by

WEATHERING, EROSION AND TRANSPORTATION

1. Devarshi Pandya- 130460106040

2. Karan Patel- 130460106056

3. Manank Patel- 130460106059

UNIVERSAL COLLEGE OF ENGG AND

TECH

It’s defined as the process of decay & disintegration of rocks under the influence of certain physical & chemical agencies of the atmosphere like wind ,ice ,sun ,water .

What is weathering ?

In simple words we can say processes at or near Earth’s surface that cause rocks and minerals to break down.

What is weathering ?

Mechanical Weathering - processes that break a rock or mineral into smaller pieces without altering its composite.

Types of Weathering….

Physical Weathering –

I. Wind II. RiverIII. GlaciersIV. Gravity

Responsible factor

Chemical Weathering - processes that change the chemical composition of rocks and minerals

Types of Weathering….

Chemical Weathering –

I. Hydration II. CarbonationIII. Oxidation

Responsible factor

Biological Weathering –The weathering process related to the activities of plants, animals & bacteria.

Types of Weathering….

Biological Weathering –

I. Trees & plants

II. AnimalsIII. Man

Responsible factor

We get vital soil for agriculture.Cheap building stones.Economic mineral due to it like: Bauxite.Weathered rocks are suitable for

tunnelling.Weathered rocks are used in railway

ballast or concrete aggregates.Weathered sites are used for

construction of dams, bridges etc

Importance of weathering

The process where the sediments are transported by wind, gravity, glaciers, man, and running water.

What is Erosion ?

Wind erosionThe wind erosion process detaches soil particles from the land surface and transports them by wind. It occurs when forces exerted by wind overcome the gravitational and cohesive forces of soil particles on the surface of the ground.

The process in which soil partials are moved by water of river. The most erosion occurs during times of flood, when more and faster-moving water is available to carry a larger sediment load.

What is River Erosion?

A glacier is a thick mass of ice which moves over the ground under the influence of gravity.

What is Glacier Erosion?

Movement of particles typically due to a combination of different forces.

There are 3 transportation included in this topic

1. Wind transportation2. River transportation3. Glacier transportation

What is Transportation?

Particles are transported by winds through bouncing & rolling along the ground.

The total sediment carried by a wind can be divided into 2 parts

Bed load Suspended load

Wind Transportation

The larger & heavier particles , such as sand or gravels ,which are moved by winds but not lift more than 30-60 cm of the earth’s surface constitutes the bed load.

Suspended load

It includes finer clay or silt particlesWhich are lifted about 100 meters above

surface

A river carries enormous amount of soil and rock material, which it receive by continued erosion from itself

The load flowing in river are divided in 3 parts

Dissolved load Suspended load Bed load

River Transportation

Dissolved load:

This includes particles which are soluble in water for ex: limestone , calcium carbonate

Suspended load:

this consists of finer materials . Which are kept in suspension by the turbulence of the flowing water.

ex: fine sand & clay

Bed load:

this includes heavier particles of sand gravels pebbles & many other type of materials.

GLACIERS acquires huge amount of rock derbies in its flow.

The material load are divided into 3 parts:

Super glacial loadEnglacial load Sub glacial load

Glacier Transportation

Super glacial load: The falls from the valley walls on the

surface of glaciers is transported as a conveyer belt.

Englacial load:The materials which is enclosed within the

ice.

Sub glacial load: The materials present at the bottom of the

glaciers .