This is an uncoordinated pattern of drainage characteristic of a region recently vacated by an ice-sheet.

The picture is one of the numerous watercourses, lakes and marshes; some inter-connected and some in local drainage basins of their own.

This type of drainage is found in the glaciated val

# The earth’s crust is made up of various types of rocks.

# Rock- Any natural mass of mineral matter that makes up the earth’s crust.

# There are three major types of rocks-
Igneous rocks-when the molten magma cools; it solidifies to become igneous rock.

# Sedimentary rocks- igneous ro

# The earth is made up of several concentric layers with one inside another.
# Crust – The uppermost layer over the earth’s surface.
# It is the thinnest of all the layers.
It is about 35 km. on the continental masses and only 5 km. on the ocean floors.
# The main mineral constituents of the

On the basis of seismic investigations, the earth can be divided into three major layers: crust, mantle, core.
Differentiation of layers of Earth

Crust: The outer superficial layer of the earth is called the "crust". In continental regions, the crust can be divided into two layers.
The upper la