Geography

Radiocarbon dating is a technique used by scientists to learn the ages of biological specimens – for example, wooden archaeological artifacts or ancient human remains – from the distant past. It can be used on objects as old as about 62,000 years. Here’s how it works. Radiocarbon dating relies on the carbon isotopes carbon-14 and … Read more

DRAW MAP Major Iron ore reserve are in : Odisha The ores are rich in haematites.India’s richest haematite deposits are located in Barabil-Koira valley.Others: Sundargarh, Mayurbhanj, Cuttack, Sambalpur, Keonjhar and Koraput districts. Jharkhand 25 per cent of reserves.First mine in Singhbhum district in 1904.Iron ore of here is of highest quality and will last for … Read more

A glance at the world map reveals that most of the desert region is on the western part of the continent for example. Mohave desert in North America, Atacama in Southern America, Namib, Sahara in Africa , Arabian in west Asia. The reasons for such homogeny are: The hot desert lie astride the Horse latitudes … Read more

The Matching of Continents (Jig-Saw-Fit) The shorelines of Africa and South America facing each other have a remarkable and unmistakable match. It may be noted that a map produced using a computer programme to find the best fit of the Atlantic margin was presented by Bullard in 1964. It proved to be quite perfect. The … Read more

Agroforestry is defined as a land use system which integrates trees and shrubs on farmlands and rural landscapes to enhance productivity, profitability, diversity and ecosystem sustainability. It is a dynamic, ecologically based, natural resource management system that, through integration of woody perennials on farms and in the agricultural landscape, diversifies and sustains production and builds … Read more

Krishna-Godavari (KG) basin, an excellent source of fuel methane Methane hydrate deposits in this basin are a rich source that will ensure adequate supplies of methane, a natural gas The study using molecular and culturing techniques revealed maximum methanogenic diversity in the KG basin, which is one of the prominent reasons to confirm it to … Read more

. Most of the metallic minerals in India occur in the peninsular plateau region in the old  crystalline rocks. Over 97 per cent of coal reserves occur in the valleys of Damodar, Sone, Mahanadi and Godavari.  Areas of high rainfall lack in soluble minerals like Limestone, Gypsum and Salt.  Northern Plains are poor in minerals … Read more

When it rains, it will increase the relative humidity because of the evaporation. The air where the rain is falling may not be completely saturated with water vapor. However, the longer it rains, the more the humidity will increase because of the air constantly drawing the water.  The evaporation will cool the air and increase … Read more

. The trade winds, westerly and easterlies  are the permanent winds. These blow constantly throughout the year in a particular  direction and they are global in nature.  These play an important role in, and in turn get influenced too, formation of Weather  Cell. Headly Cell The air at the Inter Tropical Convergence Zone (ITCZ) rises … Read more

A tsunami is a wave, or series of waves, caused by the vertical displacement of a column of water. This can be generated by earthquakes below the sea floor and violent volcanic eruptions above it, landslides above or below water or meteorite impacts into the sea. Effects of Tsunami: Affecting the mangroves, wetlands and basically … Read more