Taoudenni Depression is a internally-draining basin that currently contains no surface water, seeps, or springs. During the Holocene, however, many lakes and marshes developed in the area. The Taoudenni paleolake that we looked at earlier today is the most well-known of all of these lakes, because it was hypersaline and left behind salt deposits that have been exploited for centuries. The other lakes in the Depression do not have associated salt deposits. Haijad paleolake lies about 20 km southeast of Taoudenni paleolake (see the map at your table and at a slightly higher elevation. Modern rainfall in the Haijad area averages less than 5 mm per year, and vegetation is virtually non-existent. Team #2 Adrar Bous, in the Ténéré Desert Adrar Bous is large area of exposed bedrock located in the drifting sands of the Ténéré Desert about 65 km east of the Aïr Mountains of northern Niger. Locate Adrar Bous on your large map. Agorass N’Essoui paleolake that formed in a small depression on the south side of Adrar Bous. Modern rainfall in the Bous area averages well less than 50 mm per year, and vegetation is virtually Team #3 Selima, in northern Sudan Selima paleolake is on the margins of what is now an uninhabited oasis in northern Sudan near the Egyptian border. Selima paleolake lies just south of the rivers” we talked about in class. Locate Selima on your “radar large map of the Sahara. Before the end of the slave trade in 1898, Selima was a major watering place on the trade route from Darfur, Sudan to Assyut on the Nile. The oasis depression does not contain a modern lake. Selima is located within the Darb el Arba’in Desert (remember the "route of the 40 days" that goes from Assiut, Egypt through El Kharga and Baris Oases and west of the Toshka Depression into the Sudan). The area now averages less than 10 mm of rainfall per year. Team 4 Oyo, in northern Sudan
Taoudenni Depression is a internally-draining basin that currently contains no surface water, seeps, or springs. During the Holocene, however, many lakes and marshes developed in the area. The Taoudenni paleolake that we looked at earlier today is the most well-known of all of these lakes, because it was hypersaline and left behind salt deposits that have been exploited for centuries. The other lakes in the Depression do not have associated salt deposits. Haijad paleolake lies about 20 km southeast of Taoudenni paleolake (see the map at your table and at a slightly higher elevation. Modern rainfall in the Haijad area averages less than 5 mm per year, and vegetation is virtually non-existent. Team #2 Adrar Bous, in the Ténéré Desert Adrar Bous is large area of exposed bedrock located in the drifting sands of the Ténéré Desert about 65 km east of the Aïr Mountains of northern Niger. Locate Adrar Bous on your large map. Agorass N’Essoui paleolake that formed in a small depression on the south side of Adrar Bous. Modern rainfall in the Bous area averages well less than 50 mm per year, and vegetation is virtually Team #3 Selima, in northern Sudan Selima paleolake is on the margins of what is now an uninhabited oasis in northern Sudan near the Egyptian border. Selima paleolake lies just south of the “radar rivers” we talked about in class. Locate Selima on your large map of the Sahara. Before the end of the slave trade in 1898, Selima was a major watering place on the trade route from Darfur, Sudan to Assyut on the Nile. The oasis depression does not contain a modern lake. Selima is located within the Darb el Arba’in Desert (remember the "route of the 40 days" that goes from Assiut, Egypt through El Kharga and Baris Oases and west of the Toshka Depression into the Sudan). The area now averages less than 10 mm of rainfall per year. Team 4 Oyo, in northern Sudan
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