Geography of Asia- 2 | IBPS PO Prelims & Mains Preparation - Bank Exams PDF Download

The Central and Southern Plateaus

Plateaus are the land areas having a relatively surface considerably raised above adjoining land on at least one side and often cut by a deep canyon.

Tibetan Plateau

• The highest and largest plateau in the world and hence called the ‘roof of the world’.
• Formed due to collision of the Indo-Australian and Eurasian tectonic plates.
• The plateau is sufficiently high enough to reverse the Hadley cell convection cycles and to drive the monsoons of India towards the south.
• It covers most of the Autonomous Tibetan Region, Qinghai Province of Western China, and a part of Ladakh in Jammu and Kashmir.
• It is surrounded by mountains to the south by the Himalayan Range, to the northeast by the Kunlun Range, and to the west by the Karakoram Range.

Columbia- Snake Plateau

• River Columbia and its tributary Snake meet in this plateau.
• It is bordered by the Cascade Range and the Rocky Mountains and divided by the Columbia River.
• This plateau has been formed as the result of volcanic eruptions with a consequent coating of basalt lava (Flood Basalt Plateau).

Colorado Plateau

• It is lying to the western part of U.S.A. It is the largest plateau in America.
• It is divided by the Colorado River and the Grand Canyon.
• This plateau is an example of the intermontane plateau. Mesas and buttes are found here at many places [Arid Landforms].
• The plateau is known for the groundwater which is under positive pressure and causes the emergence of springs called Artesian wells.

Deccan Plateau

• Deccan Plateau is a large plateau that forms most of the southern part of India.
• It is bordered by two mountain ranges, the Western Ghats and the Eastern Ghats.
• The plateau includes the Deccan Traps which is the largest volcanic feature on Earth.
• Made of multiple basalt layers or lava flows, the Deccan Traps covers 500,000 square kilometers in area.
• The Deccan Traps are known for containing some unique fossils.
• The Deccan is rich in minerals. Primary mineral ores found in this region are mica and iron ore in the Chotanagpur region, and diamonds, gold, and other metals in the Golconda region.

Kimberley Plateau

• Lies in the northern part of Australia.
• This plateau is made of volcanic eruptions.
• Many minerals like iron, gold, lead, zinc, silver, and diamond are found here.
• Diamond is also found here.

Katanga Plateau

• It is lying in Congo.
• It is famous for copper production.
• Other minerals like Cobalt, Uranium, Zinc, Silver, Gold, and Tin are also mined here.

Mascarene Plateau

• Plateaus also form in the ocean, such as the Mascarene Plateau in the Indian Ocean.
• It extends between the Seychelles and Mauritius Islands.

Laurentian Plateau

• Lying in the eastern part of Canada, it is a part of the Canadian Shield.
• The fine quality of iron ore is found here.

Mexican Plateau

• It is called as ‘Mineral Store’. Different types of metallic minerals like silver, copper, etc. are obtained from here.
• World’s biggest silver mine Chihuahua is situated on the plateau.

Patagonian Plateau

• It is a Piedmont plateau (Arid Landforms) lying in the southern part of Argentina.
• It is a rain shadow desert plateau.
• It is an important region for sheep rearing.

Bolivian Plateau

• It is an intermontane plateau which is located between two ranges of Andes Mountain.
• It is a major area of Tin reserves.

Anatolian Plateau

• Also known as Asia Minor, most of Turkey lies on this plateau.
• It is an intermontane plateau lying between Pontiac and Taurus Mountain ranges.
• Tigris – Euphrates Rivers flow through this plateau.
• Precious wool-producing Angora goats are found here.

Others

• Spanish Plateau or Iberian Plateau: It is situated in the middle of Spain. It is a lava plateau. It is rich in minerals like Iron.
• Loess Plateau: It is in China. The soil here is made of fine particles brought by the wind. This fine loamy soil is extremely productive. Crops grown in this soil along the Yellow River give great yields.

Arid Landforms – Erosional, Depositional – Wind, Water Eroded

• Potwar Plateau: It is situated in northern plateau (Punjab) region of Pakistan. Its average ‘Salt Range’ is located to the south-west of the plateau.
• Bavarian Plateau: Southern part of Germany.
• Ahaggar Plateau: A small plateau located in Algeria, Sahara.

Major Plateaus of Asian Continent

Peninsulas

• A peninsula is a mass of land surrounded by water but attached to the mainland. The Deccan plateau region is also a peninsula. 
• The major peninsulas of Arabia, India, and Malay are in southern Asia. The Kamchatka peninsula lies in northeastern Asia.

Deserts

• Asia has some big deserts such as the Gobi, the Takla Makan, the Thar, the Kara-Kum, and the Rub-al-Khali Deserts.
• The Rub’ al Khali desert, considered the world’s largest sand sea, covers an area larger than France across Saudi Arabia, Oman, the United Arab Emirates, and Yemen.

Deserts of Central Asia

Islands of Asia

• Asia also has a cluster of islands, also called an archipelago. 
• An archipelago sometimes called an island group or island chain is formed close to each other in large clusters. 
• Indonesia, the Philippines, Japan, Andaman, and Nicobar are some examples of archipelagos.

Drainage of Asia

• The drainage of Asia consists of mighty oceans, extensive seas, lengthy rivers, and their tributaries and distributaries, major lakes, etc.
• Oceans: Asian continent is surrounded by three major ocean from three sides such as
• The Pacific Ocean: It covers the eastern part of Asia where major rivers of eastern Asia drain, such as Menam Mekong, Xi Jiang, Chang Xiang, Huang Ho, and Amur.
• The Indian Ocean: It covers the southern part of Asia and the major rivers that flow into the Indian Ocean are Tigris, Euphrates, the Indus, the Ganga, Brahmaputra, Irrawaddy, Salween.
• The Arctic Ocean: It covers the North east part of Asia and consists of three major rivers such as Ob, Yenisei, and Lena.

Drainage Patterns

The patterns formed by the streams, rivers and lakes in a particular drainage basin which are governed by the topography of the land constitute the drainage patterns of an area.
There are 7 types of drainage patterns:

1. Dendritic drainage pattern: looks like the branching of a tree, found in regions with homogenous material.
2. Parallel drainage pattern: forms where there is a slope.
3. Trellis Drainage Pattern: patterns look similar to the common garden trellis.
4. Rectangular Drainage Pattern: found in regions that have undergone faulting.
5. Radial Drainage Pattern develops: around a central elevated point.
6. Centripetal Drainage Pattern: flows towards a central depression.
7. Deranged Drainage Pattern: develop from the disruption of a pre-existing drainage pattern.

Drainage Patterns

Rivers

Rivers of Asia

Important Rivers

Seas

• As the continent is covered by sea from its three sides, It has also characterized by the long stretch of bay and gulf.
• Major seas contributing to Asian Drainage are Andaman Sea, Arabian Sea, Banda Sea, Barents Sea, Bering Sea, Black Sea, Caspian Sea, East Siberian Sea, Java Sea, Kara Sea, Laccadive Sea, Sea of Japan, Sea of Okhotsk. The South China Sea and the Yellow Sea.

Important Seas

Lakes

Major lakes of Asia are

• Lake Baikal, Onega, Ladoga, and Peipus in Russia;
• Lake Akan, Mashu, Biwa, Shikotsu in Japan;
• Qinghai Lake, Lake Khanka in China;
• Dal Lake, Chilka, Vembanada, Pullicat and Sukhna in India;
• Lake Matano and Toba in Indonesia, etc.

Baikal is the deepest lake in the world. It is in Southern Siberia, Russia.

Important Lakes

Freshwater

• Lake Baikal, located in southern Russia, is the deepest lake in the world, reaching a depth of 1,620 meters (5,315 feet). The lake contains 20 percent of the world’s unfrozen freshwater, making it the largest reservoir on Earth. It is also the world’s oldest lake, at 25 million years old.
• The Yangtze is the longest river in Asia and the third-longest in the world (behind the Amazon of South America and the Nile of Africa). Reaching 6,300 kilometers (3,915 miles) in length, the Yangtze moves east from the glaciers of the Tibetan Plateau to the river’s mouth on the East China Sea. The Yangtze is considered the lifeblood of China.
• The Tigris and Euphrates Rivers begin in the highlands of eastern Turkey and flow through Syria and Iraq, joining in the city of Qurna, Iraq, before emptying into the Persian Gulf. The land between the two rivers, known as Mesopotamia, was the center of the earliest civilizations, including Sumer and the Akkadian Empire.

Saltwater

• The Persian Gulf has an area of more than 234,000 square kilometers (90,000 square miles). It borders Iran, Oman, United Arab Emirates, Saudi Arabia, Qatar, Bahrain, Kuwait, and Iraq. The gulf is subject to high rates of evaporation, making it shallow and extremely salty.
• The Sea of Okhotsk covers 1.5 million square kilometers (611,000 square miles) between the Russian mainland and the Kamchatka Peninsula.
• The Bay of Bengal is the largest bay in the world, covering almost 2.2 million square kilometers (839,000 square miles) and bordering Bangladesh, India, Sri Lanka, and Burma. Many large rivers, including the Ganges and Brahmaputra, empty into the bay.

Straits

The important straits in Asia are the Strait of Malacca, Bering Strait, etc.

Important Straits

Resources

Asia’s climate can be most generally divided into three zones:

• North/central,
• Southwest
• Southeast

North/Central Zone

• The continent’s north/central zone is affected by cold and dry Arctic winds, especially in the Siberia region of Russia.
• Hardier grains, such as barley, buckwheat, millet, oats, and wheat, are grown in the central and southern areas of this zone, where permanent frosts inhibit plant growth.
• Animal husbandry is also very important in this zone. In Mongolia, for example, 75 percent of agricultural land is allocated to the rearing of livestock, such as sheep, goats, and cattle.

Southwest

• The southwest zone is a dry, hot region that stretches from the Gobi Desert in Mongolia through Pakistan, Iran, and into the Arabian Peninsula.
• This zone has very few areas with enough moisture and precipitation to produce crops. Grains, such as barley and corn, are the principal irrigated crops of some countries.
• Dates, figs, apricots, olives, onions, grapes, and cherries are the most important of these fruit and vegetable crops.

Southeast

• The southeast zone is greatly affected by the summer monsoon season.
• Rice is one of Asia’s most important agricultural commodities and a major food staple of the entire continent.
• Many regions where rainfall is less, grow a large amount of wheat.
• Southeast Asia is also a major producer of tropical fruits, such as mango, papaya, and pineapple. India is the world’s largest mango-producing nation, accounting for roughly 40 percent of total global output.

Mining

• China, India, Russia, and Indonesia are the continent’s most productive mining economies. These countries extract many of the same minerals.
• China is the world’s largest producer of aluminum, gold, tin, and coal.
• India is also a major producer of aluminum and iron ore, along with other minerals such as barite (used in drilling fluids), chromium (used in steel production and dyes), and manganese (used in steel production).
• Russia is a major producer of coal, tungsten (used in steel production), diamonds, iron, and steel.
• Indonesia is a major producer of coal, gold, copper, and tin.

Drilling

• Countries on the Arabian Peninsula have the world’s largest deposits of oil and natural gas. These fossil fuels are drilled for energy and fuel.
• The oil found throughout the Arabian Peninsula and the Middle East is of the highest quality: light sweet crude.
• Light sweet crude oil is used to make gasoline, kerosene, and diesel fuels.
• In 2010, Saudi Arabia was the world’s largest manufacturer of petroleum liquids, producing 10.07 million barrels of liquid fuels every day. (An oil barrel is 159 liters or 42 gallons.) It also has the world’s largest oil reserves, at roughly 250 billion barrels.
• Russia has oil reserves in Siberia and massive natural gas reserves throughout the Arctic.
• Russia and Iran have the world’s largest reserves of natural gas, while the US produces the most