Earth Science # Environment

Soil Erosion and Conservation in India

Soil erosion in India Excessive soil erosion in India combined with consequent high rate of sedimentation in reservoirs and decreased soil fertility has led to grave environmental problems. Soil erosion mostly affects practically all kinds of lands such as the forest lands, agricultural lands, arid and semi-arid lands, surface mines, roads, construction sites, coastal areas etc. Further, since soil formation is a very slow process, the erosion of the upper layer of the soil leaves it barren for a long...

Earth Science # Science

What is soil liquefaction? Causes, effects and measures

“A Phenomenon whereby a saturated or partially saturated soil substantially loses strength and stiffness in response to an applied stress, usually earthquake shaking or other sudden change in stress condition, causing it to behave like a  liquid” is called Soil Liquefaction (Hazen,1918). There are two types of soil liquefaction. 1) Flow liquefaction 2) Cyclic Mobility  How does Soil Liquefaction Work: The soil is a mixture of soil particles that stay connected together. These particles...

Earth Science

Volcanoes around the world – what is likely to become active

A volcano is the emission of lava, ash and gases from deep under the earth’s surface through a crack on the surface of the earth. According to the Plate Tectonic Theory, the earth’s lithosphere (which includes the crust and upper mantle) is made of tectonic plates. These tectonic plates meet at three different kinds of boundaries namely convergent, divergent and transform. Due to the movement of these plates along the boundaries or faults, tectonic activities occur. These tectonic activities...

Earth Science

When is the next ice age due?

Ice Age is one of the most famous animated film series that deals with the life and struggles of animals that had been part of the earth’s biodiversity during the ice age. What is an ice age and when is the next ice age due? Ice age, which is also known as glacial age, is the refrigeration of the earth’s climate. Ice sheets and other types of glaciers expand to cover large areas of land, beyond the Polar Regions, reaching up to the temperate zones of today. The chronology of the earth’s geological...

Earth Science

Hot water springs in India

India is a country with vast diversity in terms of geographical landforms and features. Our country is endowed with mineral wealth as also with hot and cold water springs. Hot Water Springs In India Thermal springs or hot water springs are formed due to geothermally heated water emerging onto the earth’s surface through cracks. This heat comes from deep inside the earth’s surface. In north India, Jammu and Kashmir, Uttarakhand, Himachal Pradesh and Haryana and western states such as Gujarat...

Earth Science # Science

Glacial Landforms in Relation to the Himalayas

Glaciers are represented by the flowing movement of a thick mass of ice and form as a result of the compaction or recrystallization of snow. Glaciers occur in areas whose climate favours the seasonal accumulation of snow in greater volumes than seasonal ablation. Here the seasonal accumulation of snow outpaces seasonal ablation that occurs due to loss of snow from melting, calving, evaporation and/or wind erosion. Glaciers can thus be found in Polar and Alpine Regions where temperatures can be substantially...

Earth Science # Magazine Articles

The Glaciers of the Himalaya

In the central and eastern Himalayas, a general negative mass balance has been reported, whereas in the glaciers of the Karakoram Range in the northwestern Himalaya, heterogeneous behaviour is depicted.

Earth Science

Rare Super Blue Blood Moon Visible on January 31st 2018

The National Aeronautics and Space Administration’s (NASA’s) prediction is correct, and we will be able see a super blue blood moon in the night skies today on January 31st, 2018. In this event the lunar eclipse with a reddish moon, the super moon (a closer and larger moon) and the blue moon (two full moons within a month) could all be visible simultaneously. Termed as a super blue blood moon, this sort of lunar eclipse is an extremely rare event and last occurred in December, 1982. It is expected...

Earth Science

Understanding the Classification of the Biomes of the World

No two ecosystems in locations around Earth can be said to have the exact assortment of species forming habitats in them. However, terrestrial ecosystems and biological communities of organisms can be classified into categories on the basis of climatic features and the predominant plant forms appearing in these locations. On the basis of these categories, the different types of biomes of the world are classified. The presence of similar vegetation or the complete absence of it in similar climatic...

Earth Science

Antarctic Subglacial Lakes Might Offer Unique Surprises

Radar measurements of subterranean Antarctica have revealed that a massive network of rivers, streams and lakes exist beneath the ice sheet in Antarctica. These regions are host to a number of Antarctic aquatic environments beneath the Antarctic ice sheet. Subglacial Lakes in Antarctica The radar measurements used include both surface and airborne radar measurements that have managed to identify greater than 400 Antarctic subglacial lakes (Seigert et al., 2016). The largest of these is Lake...