What is an erg in Africa?

erg, also called Sand Sea, in a desert region, area of large accumulation of sand, generally in the bottom of a huge basin in which a former river piled up alluvium. Ergs are areas of actively shifting dunes, “fossilized” dunes, or extensive sand sheets. The sand is generally loose and is extremely difficult to cross.

What does erg mean in Africa?

THE TERM erg is the Bedouin name for a very large body of sand dominated by sand dunes. Bedouins are an African tribe of nomadic herders living in the northern SAHARA DESERT. Two equivalent English-language terms are sand sea and dune field. Transverse dunes typically are part of ergs, or sand seas.

Is the Sahara an erg?

The largest hot desert in the world, the Sahara, covers 9 million square kilometres (3.5×10⁶ sq mi) and contains several ergs, such as the Chech Erg and the Issaouane Erg in Algeria. Approximately 85% of all the Earth's mobile sand is found in ergs that are greater than 32,000 km² (12,355 sq mi).

What are regs in Africa?

Regs are plains of sand and gravel that make up 70 percent of the Sahara. The gravel can be black, red, or white. Regs are the remains of prehistoric seabeds and riverbeds, but are now nearly waterless. Hamadas are elevated plateaus of rock and stone that reach heights of 3,353 meters (11,000 feet).

What is a erg in Algeria?

An erg is a flat area of a desert covered by windblown sand that could be more than 125 square kilometers of Aeolian or windblown sand with little or no vegetative cover. Ergs are mostly found in the Sahara desert where Issaouane Erg and Chech Erg are found in Algeria.

10 facts about ERG

What does erg stand for?

It's an acronym you should know. ERG stands for employee resource group. Other lesser used terms include affinity groups or business networking groups. Current groups offer much more than mere professional networking opportunities. ERGs can be found in 90% of Fortune 500 companies.

What is underneath the sand in the Sahara?

Beneath the sands of the Sahara Desert scientists have discovered evidence of a prehistoric megalake. Formed some 250,000 years ago when the Nile River pushed through a low channel near Wadi Tushka, it flooded the eastern Sahara, creating a lake that at its highest level covered more than 42,000 square miles.

What is Hamada and ERG?

Hamada is related to desert pavement (known variously as reg, serir, gibber or saï), which occurs as stony plains or depressions covered with gravels or boulders, rather than as highland plateaus. Hamadas exist in contrast to ergs, which are large areas of shifting sand dunes.

What is a hill made of sand called?

A dune is a mound of sand this is formed by the wind, usually along the beach or in a desert. Dunes form when wind blows sand into a sheltered area behind an obstacle.

What are Hammadas in the Sahara Desert?

A hamada is a type of desert landscape consisting of high, largely barren, hard, rocky plateaus with very little sand. Hamada is related to desert pavement.

What is the largest erg in the world?

The world's largest erg today is the Rub'al Khali (Empty Quarter), which covers more than 650,000 km² in the southern Arabian Peninsula with vast expanses of sand dunes exceeding 250 m in height.

Where did the sand in the Sahara come from?

The sand is primarily derived from weathering of Cretaceous sandstones in North Africa. When these sandstones were deposited in the Cretaceous, the area where they are now was a shallow sea. The original source of the sand was the large mountain ranges that still exist in the central part of the Sahara.

What does an employee resource group do?

ERGs support learning and development by offering formal and informal leadership opportunities and creating visibility for employees who are active. ERGs also provide a resource for leadership and decision-makers regarding staff/community issues, needs and policies.

What is an ancient erg?

erg, also called Sand Sea, in a desert region, area of large accumulation of sand, generally in the bottom of a huge basin in which a former river piled up alluvium. Ergs are areas of actively shifting dunes, “fossilized” dunes, or extensive sand sheets.

What is a reg?

1. Reg is a slang term or shortened reference for a regulation or registration. An example of a reg is how someone would refer to a city sound ordinance; a city government reg. noun.

Where is the biggest sand dune in the world?

Badain Jaran Dunes – Gobi Desert, China

The Badain Jaran desert in Inner Mongolia, China has the largest stationary dunes on Earth. The Wushumu dune is the tallest peak with over 500 meters in height.

What is a small hill called?

hillock. A small hill; mound. 3.

Does a beach have to be by the ocean?

A beach is a narrow, gently sloping strip of land that lies along the edge of an ocean, lake, or river. Materials such as sand, pebbles, rocks, and seashell fragments cover beaches. Most beach materials are the products of weathering and erosion. Over many years, water and wind wear away at the land.

What are wadis in the Sahara desert?

Wadis are temporary water sources located primarily in the mountains and fed by rainfall. They are home to most of the Sahara's trees and large bushes. Chotts are depressions that fill with salt once moisture from the Sahara's winter rains evaporates in the spring and summer.

What is an example of a hamada?

Example of the Hamada Equation

Or consider retailer Target (NYSE: TGT), which has a current unlevered beta of 0.82. Its debt-to-equity ratio is 1.05 and the effective annual tax rate is 20%. Thus, the Hamada coefficient is 0.99, or 0.82 [1 + (1 - 0.2) (0.26)].

Where are hamada found?

The rocky desert or hamada, locally known as hazm and/or mistah, meaning unfruitful, is the ecosystem most abundantly seen in Qatar. The rocks are formed by weathering of local bedrock, while finer particles may also be transported on site by sand- or rain-storms.

Who owns Sahara Desert?

The Sahara covers large parts of Algeria, Chad, Egypt, Libya, Mali, Mauritania, Morocco, Niger, Western Sahara, Sudan and Tunisia. It covers 9 million square kilometres (3,500,000 sq mi), amounting to 31% of Africa.

Is there oil in the Sahara desert?

Oil, Natural Gas and Minerals

An enormous wealth of natural resources is hidden beneath the Sahara Desert. Principal among these riches are huge amounts of oil and natural gas, particularly in territory belonging to Algeria and Libya.