Earth Snapshot RSS Feed Twitter

Posts tagged Tassili n’Ajjer

Mountains, Sandy Desert and Impact Craters in Southeastern Algeria

25.3N 8.2E

May 30th, 2011 Category: Deserts, Mountains

Algeria - May 23rd, 2011

The Tassili n’Ajjer, a mountain range in the Sahara desert, is visible as a vast, dark brown plateau in the lower part of this image. It is located in south-east Algeria at the borders of Libya, Niger and Mali, covering an area of 72,000 sq. km.

Some large areas of orange sand dunes can be seen to the north; individual rows of dunes can be discerned in the full image.

Located within the light tan area situated between the plateau and the dune sea is the Tassili in Bider, an impact crater that sits in dry, rugged terrain in Algeria. Spanning 6 kilometres, the crater sits at the southern end of a range of hills. It has an elevated position and concentric rings.

Tassili n’Ajjer and Ahaggar Ranges in Algeria

24.7N 7.0E

January 7th, 2011 Category: Deserts, Mountains

Algeria - December 27th, 2010

Several mountain ranges can be observed towering above the light Sahara Desert sands in this image of Algeria. The dark brown range in the upper right quadrant is the Tassili n’Ajjer.

The lighter brown mountains in the lower half of the image belong to the Ahaggar Range. In the full image, the ridges of these two ranges and the rows of sand dunes around them can be observed in greater detail.

Dry Riverbeds of the Tassili n’Ajjer Mountains, Algeria

25.5N 9.0E

October 23rd, 2010 Category: Mountains

Algeria - October 13th, 2010

The Tassili n’Ajjer is a mountain range in the Sahara desert in southeast Algeria. Its name means “Plateau of the Rivers” in Tamazight, referring to a time long ago when the climate was significantly wetter.

Upon opening the full image some of the old, dry riverbeds can still be observed cutting through the mountains. Although the rivers no longer flow abundantly, due to the altitude and the water-holding properties of the sandstone, the vegetation is somewhat richer than the surrounding desert.

Dunes and Mountains of the Sahara Desert

28.2N 6.0E

October 13th, 2010 Category: Deserts, Mountains

Tunisia, Algeria and Niger - September 15th, 2010

This image stretches across the arid Sahara Desert. In the full image, it reaches from southern Tunisia, across Algeria, and over much of Niger (from north to south).

The upper part of the full image contains the driest areas, particularly the “sea” of sand dunes of the Grand Erg Oriental, (appearing smooth and yellow to orange in color, near the top). The smooth appearance is deceiving, however, as many of the dunes are extremely high.

The Grand Erg Oriental covers an area some 600 km. wide by 200 km. north to south, making it the largest erg in Algeria. The erg’s northeastern corner spills over into neighbouring Tunisia.

Moving southward, one crosses over the mountains of the Tassili n’Ajjer (dark brown), the Ahaggar Range (lighter brown, south of the former) and finally the Aïr Mountains (further south, along the right edge of the full image). Towards the very bottom of the full image, the terrain begins to appear slightly green in color and less arid.

Mountains and Sand Dune Seas in Libya and Algeria

23.8N 8.4E

October 4th, 2010 Category: Deserts, Mountains

Libya and Algeria - August 27th, 2010

Mountains rising above the yellow sands of the Sahara Desert appear dark brown in color in this image focusing on the border area of Algeria and Libya. Large expanses of sand dunes, known as ergs, appear orange and yellow in color. In the full image, rows of high dunes can be distinguished.

The  dark brown chain in the center is the Tassili n’Ajjer, while the lighter brown mountains to its south belong to the Ahaggar Range. In the full image, a third group of mountains, the Aïr Mountains, in Niger, can also be seen near the bottom.