Talemzane crater
Encyclopedia
Madna or Talemzane is an impact crater
Impact crater
In the broadest sense, the term impact crater can be applied to any depression, natural or manmade, resulting from the high velocity impact of a projectile with a larger body...

 in Algeria
Algeria
Algeria , officially the People's Democratic Republic of Algeria , also formally referred to as the Democratic and Popular Republic of Algeria, is a country in the Maghreb region of Northwest Africa with Algiers as its capital.In terms of land area, it is the largest country in Africa and the Arab...

, 40 km south-east of Hassi Delaa
Hassi Delaa
Hassi Delaa is a town and commune in Laghouat Province, Algeria. According to the 1998 census it has a population of 6,930....

 (a small city).

Explored for the first time in 1928, studied in 1950 and 1988 by reshars from university of Oran (Algeria) and Nice (France). It is 1.75 km in diameter and the age is estimated to be less than three million years and is probably Pliocene
Pliocene
The Pliocene Epoch is the period in the geologic timescale that extends from 5.332 million to 2.588 million years before present. It is the second and youngest epoch of the Neogene Period in the Cenozoic Era. The Pliocene follows the Miocene Epoch and is followed by the Pleistocene Epoch...

.
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