It is a sedimentary rock made up of loosely structured, rough grains of rock.

Related extras


People have always preferred to settle near rivers. What are the advantages and disadvantages of...

Weather fronts

When masses of cold and warm air meet, weather fronts develop.

Climate zones

The Earth is divided into geographical and climatic zones, which result in the zonation...

Solar eclipse and lunar eclipse

We can observe quite interesting astronomical phenomena when the Earth, the Sun and the Moon align.

Weather and climate

Climate is the typical weather of a certain region that changes practically only on a geological...

Deep Sea Hydrothermal Vents

A hydrothermal vent is a fissure in the planet's surface through which geothermally...

Wind at the beach

Sea and land breeze form because of the differing warming of land and sea.


Lightning is a sudden electrostatic discharge accompanied by a sound known as thunder.

Added to your cart.