The Taoudeni Basin is a major

Sedimentary basin Sedimentary basins are region-scale depressions of the Earth's crust where subsidence has occurred and a thick sequence of sediments have accumulated to form a large three-dimensional body of sedimentary rock They form when long-term subsidence ...

West Africa West Africa, also known as Western Africa, is the westernmost region of Africa. The United Nations geoscheme for Africa#Western Africa, United Nations defines Western Africa as the 16 countries of Benin, Burkina Faso, Cape Verde, The Gambia, Gha ...

, named after the

Taoudenni Taoudenni (also Taoudeni, Taoudénit, Taudeni, , ) is a remote salt mining center in the desert region of northern Mali, north of Timbuktu. It is the capital of Taoudénit Region. The salt is dug by hand from the bed of an ancient salt lake, c ...

village in northern Mali. It covers large parts of the

West African craton The West African Craton (WAC) is one of the five cratons of the Precambrian basement rock of Africa that make up the African Plate, the others being the Kalahari craton, Congo craton, Saharan Metacraton and Tanzania Craton.Jessell M.W., Li ...

Mauritania Mauritania, officially the Islamic Republic of Mauritania, is a sovereign country in Maghreb, Northwest Africa. It is bordered by the Atlantic Ocean to the west, Western Sahara to Mauritania–Western Sahara border, the north and northwest, ...

and

Mali Mali, officially the Republic of Mali, is a landlocked country in West Africa. It is the List of African countries by area, eighth-largest country in Africa, with an area of over . The country is bordered to the north by Algeria, to the east b ...

. It is of considerable interest due to its possible reserves of oil. In addition to its economic importance, the basin contains scientifically important

fossils A fossil (from Classical Latin , ) is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved ...

from the Late

Mesoproterozoic The Mesoproterozoic Era is a geologic era that occurred from . The Mesoproterozoic was the first era of Earth's history for which a fairly definitive geological record survives. Continents existed during the preceding era (the Paleoproterozoic ...

and Early

Neoproterozoic The Neoproterozoic Era is the last of the three geologic eras of the Proterozoic geologic eon, eon, spanning from 1 billion to 538.8 million years ago, and is the last era of the Precambrian "supereon". It is preceded by the Mesoproterozoic era an ...

eras, which correspond to a time interval known as the

Boring Billion The Boring Billion, otherwise known as the Mid Proterozoic and Earth's Middle Ages, is an informal geological time period between 1.8 and 0.8 billion years ago ( Ga) during the middle Proterozoic eon spanning from the Statherian to the Tonian ...

Description

The Taoudeni is the largest sedimentary basin in Northwest Africa, formed during the

Middle Middle or The Middle may refer to: * Centre (geometry), the point equally distant from the outer limits. Places * Middle (sheading), a subdivision of the Isle of Man * Middle Bay (disambiguation) * Middle Brook (disambiguation) * Middle Creek ...

Late Proterozoic The Neoproterozoic Era is the last of the three geologic eras of the Proterozoic eon, spanning from 1 billion to 538.8 million years ago, and is the last era of the Precambrian "supereon". It is preceded by the Mesoproterozoic era and succeeded b ...

. It continued to subside until the Middle Paleozoic, when

Hercynian Hercynia is a name for the ancient Hercynian Forest. Hercynia or Hercynian may also refer to: *458 Hercynia, an asteroid *Hercynian orogeny, a synonym for the Variscan orogeny The Variscan orogeny, or Hercynian orogeny, was a geologic mountai ...

deformation and uplift occurred. It contains up to of Late

Precambrian The Precambrian ( ; or pre-Cambrian, sometimes abbreviated pC, or Cryptozoic) is the earliest part of Earth's history, set before the current Phanerozoic Eon. The Precambrian is so named because it preceded the Cambrian, the first period of t ...

and Paleozoic sediments. Exploratory drilling since the 1980s has found indications of petroleum in the Late Precambrian,

Silurian The Silurian ( ) is a geologic period and system spanning 23.5 million years from the end of the Ordovician Period, at million years ago ( Mya), to the beginning of the Devonian Period, Mya. The Silurian is the third and shortest period of t ...

and Late

Devonian The Devonian ( ) is a period (geology), geologic period and system (stratigraphy), system of the Paleozoic era (geology), era during the Phanerozoic eon (geology), eon, spanning 60.3 million years from the end of the preceding Silurian per ...

formations. Sediments are thicker in the western half of the basin.

Petroleum geology

The government of Mali, one of the poorest countries in the world, is eager to create an oil industry. Companies that have been exploring in the area include Baraka Petroleum,

Sonatrach Sonatrach (; ) is the national state-owned oil company of Algeria. Founded in 1963, it is known today to be the largest company in Africa with 154 subsidiaries, and often referred as the first African oil "major". In 2021, Sonatrach was the seven ...

Eni Eni is an Italian oil and gas corporation. Eni or ENI may refer to: Businesses and organisations * Escuela Nacional de Inteligencia, the Argentine intelligence academy * Groupe des écoles nationales d’ingénieurs (Groupe ENI), a French engi ...

Total S.A. TotalEnergies SE is a French multinational integrated energy and petroleum company founded in 1924 and is one of the seven supermajor oil companies. Its businesses cover the entire oil and gas chain, from crude oil and natural gas explorat ...

, Woodside and

CNPC The China National Petroleum Corporation (CNPC) () is a major national oil and gas corporation of China and one of the largest integrated energy groups in the world. Its headquarters are in Dongcheng District, Beijing. CNPC was ranked fourth ...

. However, the remote location and harsh environment of the

Sahara Desert The Sahara (, ) is a desert spanning across North Africa. With an area of , it is the largest hot desert in the world and the list of deserts by area, third-largest desert overall, smaller only than the deserts of Antarctica and the northern Ar ...

would make extraction expensive. Baraka Petroleum is bankrupt and the website does not exist any more. The exploration assets are now (2012) in the hands of Eni Group, Woodsite and Sonatrach.

References

External links

* {{Major African geological formations Sedimentary basins of Africa Geology of Algeria Geology of Mali Geology of Mauritania Landforms of Algeria Landforms of Mali Landforms of Mauritania Proterozoic Africa Paleozoic Africa