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Posts tagged Tarso Toh

Volcanoes and Lava Flows of the Tibesti Mountains, Chad and Libya – November 26th, 2010

21.3N 16.3E

November 26th, 2010 Category: Image of the day, Mountains, Volcanoes

Chad and Libya - November 9th, 2010

The Tibesti Mountains appear as a large brown area occupying most of this image of northern Chad and part of southern Libya. They are a group of dormant volcanoes forming a mountain range in the central Sahara desert, visible as the tan area to the north and west.

In the center of the mountains, in Chad, is Tarso Voon, a stratovolcano with a summit caldera that is 14 x 18 km large. Ignimbrite deposits surround the caldera to distances of 15–35 km.

The dark brown area to the west is Toussidé (also known as Tarso Toussidé), a potentially active volcano that rises to an elevation of 3265 m above sea level. The octopus-like brown shape is due to lava flows extending down the western flank.

Finally, to the north of Toussidé is Tarso Toh, a volcanic field that fills valleys and plains over an area of 80 km in east-west direction and 20–30 km in north-south direction. It contains 150 scoria cones and two maars.

Sahara Desert in Libya and Chad – March 5th, 2009

March 5th, 2009 Category: Image of the day, Volcanoes

Desert in Libya - February 26th, 2009

Desert in Libya - February 26th, 2009





The sands of the Sahara Desert in southern Libya (above), slightly covered by clouds, and northern Chad (below) have different hues, ranging from tan and light yellow to golden orange to red.

Many large dunes can be observed in all the images, although they are most prominent in the second close-up.

The first close-up highlights the dunes near the northern end of a volcanic field in Chad, the Tarso Toh. It is located north of Tarso Toussidé volcano and fills valleys and plains over an area of 80 km in an east-west direction and 20-30 km in north-south direction. The field contains 150 scoria cones and two maars (broad, low-relief volcanic craters caused by a phreatomagmatic eruptions – explosions that occur when groundwater comes into contact with hot lava or magma).