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Posts tagged Tassili n’Ajjer

Northern Africa, from Tunisian Coast to Mountains in Niger

28.2N 9.3E

August 21st, 2010 Category: Mountains

Northern Africa - August 5th, 2010

The image thumbnail focuses on ergs (seas of sand dunes) and mountains in eastern Algeria (left half) and western Libya (right half). The two mountain ranges are the Tassili n’Ajjer (center, dark brown), and the Ahaggar Mountains (bottom center, lighter brown). Some dust can be seen blowing over the Ahaggar range.

The full image reaches from the shores of Tunisia (top) to the Aïr Mountains in Niger (bottom). The Kerkennah Islands (above) and the island of Djerba (below) can be seen near the Tunisian coast. Some greenish sediments can be seen around the islands.

Mountain Ranges Amidst Sahara Sands, Algeria

23.1N 5.8E

July 14th, 2010 Category: Mountains

Algeria - June 30th, 2010

Algeria - June 30th, 2010

Two mountain ranges are visible amidst the orange sands of the Sahara Desert in Algeria: the Tassili n’Ajjer, with a pointed triangular shape (center), and the Ahaggar Mountains to the south, separated from the former by a stretch of light sands.

Upon opening the full image, some dust appears to be hanging in the air to the south of the mountains. This later became a more intense dust storm (click here for article).

Dust Blowing Over Ahaggar and Tassili n’Ajjer Mountains in Algeria

23.1N 5.8E

July 8th, 2010 Category: Dust Storms, Mountains

Algeria - July 4th, 2010

Algeria - July 4th, 2010

Strong winds kick up clouds of sand and dust from the Sahara Desert over Algeria.The dust is whitish tan in color like the desert sands to the south, in contrast with the golden orange tones of the expansive ergs to the north.

The lower half of this image is mostly veiled by the shifting sands. Just below the center, the Ahaggar Mountains are mostly obscured; only the northwestern part of the range can be seen. In the upper half, several bands of dust can be seen blowing over the brown mountains of the Tassili n’Ajjer range.

Sahara Dunes by Tassili n’Ajjer Mountains in Illizi, Algeria – July 5th, 2010

25.5N 9.0E

July 5th, 2010 Category: Image of the day, Mountains

Algeria - April 28th, 2010

Algeria - April 28th, 2010

Part of the Illizi province (wilaya), in the south-eastern corner of Algeria, is visible here. The upper half of the image shows the orangey sand dunes of the Sahara Desert, while the lower half shows the brown slopes of the Tassili n’Ajjer mountain range.

The name of the range means “Plateau of the Rivers” in Tamazight. As the name suggests, the topography of the range is deeply indented, eroded by rivers in the past. Today the range is drier, although due to the altitude and the water-holding properties of the sandstone, the vegetation is somewhat richer than the surrounding desert.

Mountain Ranges in the Sahara Desert, Algeria and Niger

23.2N 5.5E

April 26th, 2010 Category: Mountains

Niger - March 5th, 2010

Niger - March 5th, 2010

Several mountain ranges are visible in Algeria and Niger, standing out against the yellow sands of the Sahara. From top to bottom they are the Tassili n’Ajjer, the Ahaggar Mountains and the Aïr Mountains.

The Tassili n’Ajjer extends for about 500 km. The range’s highest point is Adrar Afao, at 2158 meters. The range is composed largely of sandstone. Erosion in the area has resulted in nearly 300 natural rock arches being formed, along with many other spectacular landforms.

The Ahaggar Mountains, also known as the Hoggar, are a highland region in central Sahara, or southern Algeria. The region is largely rocky desert with an average altitude of more than 900 metres (2,953 feet) above sea level. The highest peak is at 3,003 meters (Mount Tahat).

Finally, the Aïr Mountains can be seen in the lower right corner. Some of the dark granite peaks and plateaus have a circular shape.  These mountains reach heights of more than 6,000 ft (1 830 m) and extend over an area of 84000 km².