Todra Volcanic Field, Niger

By ExploreNow Editor, on December 21st, 2011%

Volcano Type: Cinder cones
Volcano Status: Holocene
Last Known Eruption: Unknown
Summit Elevation: 1780 m   5,840 feet
Latitude: 17.68°N *   17°41’0″N
Longitude: 8.50°E   8°30’0″E

The Todra volcanic field covers a broad area of about 1050 sq km in the Tuareg shield in the southern Aïr region of Niger. Activity began with the eruption of about 30 trachytic and phonolitic volcanoes through Precambrian basement rocks. This was followed by the formation of about 130 basaltic cones that typically produced a valley filling lava flow. A series of NW-SE-trending faults control volcano locations. The date of the latest eruption of the Todra volcanic field is not known, but may have been as recent as a few centuries ago.

Originally posted 2010-11-12 03:35:31.

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In Ezzane Volcanic Field, Algeria-Niger

By ExploreNow Editor, on December 13th, 2011%

Volcano Type: Volcanic field
Volcano Status: Holocene
Last Known Eruption: Unknown
Summit Elevation: Unknown
Latitude: 23.00°N *   23°0’0″N
Longitude: 10.83°E   10°50’0″E

The In Ezzane volcanic field lies in SE Algeria, near the border with Niger. The alkaline In Ezzane volcanic field, part of which extends into Niger, covers about 500 sq km at the eastern end of Hoggar (Ahaggar) volcanic province and was assigned a Recent age (Liegeois et al., 2005). This poorly known and isolated volcanic field erupted through basement rocks at the western end of the Saharan meta-craton.

Originally posted 2010-11-12 04:42:05.

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