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Adrar Bous is a
massif A massif () is a principal mountain mass, such as a compact portion of a mountain range, containing one or more summits (e.g. France's Massif Central). In mountaineering literature, ''massif'' is frequently used to denote the main mass of an ...
in the
Aïr Mountains The Aïr Mountains or Aïr Massif (Air Tamajeq language, Tamajăq: ''Ayǝr''; Hausa language, Hausa: Eastern ''Azbin'', Western ''Abzin'') is a triangular massif, located in northern Niger, within the Sahara. Part of the West Sa ...
on the western edge of the Ténéré Desert,
Niger Niger, officially the Republic of the Niger, is a landlocked country in West Africa. It is a unitary state Geography of Niger#Political geography, bordered by Libya to the Libya–Niger border, north-east, Chad to the Chad–Niger border, east ...
. Archaeological research at Adrar Bous, conducted by J. Desmond Clark, has produced finds spanning the Late
Acheulean Acheulean (; also Acheulian and Mode II), from the French after the type site of Saint-Acheul, is an archaeological industry of stone tool manufacture characterized by the distinctive oval and pear-shaped "hand axes" associated with ''Homo ...
(1.76 – 0.13 Ma) through the
Neolithic The Neolithic or New Stone Age (from Ancient Greek, Greek 'new' and 'stone') is an archaeological period, the final division of the Stone Age in Mesopotamia, Asia, Europe and Africa (c. 10,000 BCE to c. 2,000 BCE). It saw the Neolithic Revo ...
(11,950 – 6,450 BP). The massif contains a number of sites where microlithic tools are present, along with faunal and human remains. Most notable are extensive remains of ritualized feasting by specialized Tenerian cattle pastoralists. Its name is written in the
Tamasheq Tamashek or Tamasheq is a variety of Tuareg, a Berber macro-language widely spoken by nomadic tribes across North and West Africa in Algeria, Mali, Niger, and Burkina Faso. Tamasheq is one of the three main varieties of Tuareg, the others bei ...
language. The massif itself has been dated to be about 487 million years old.


Geology

While the oldest formations in Adrar Bous date to the
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 ...
period (~4600 – 541.0 ± 1.0 Ma), much of the ring-dike formation originated during the early
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 ...
period (443.8 ± 1.5 – 419.2 ± 3.2 Ma), likely due to the melting of the Saharan ice caps at that time. The massif is composed primarily of
granite Granite ( ) is a coarse-grained (phanerite, phaneritic) intrusive rock, intrusive igneous rock composed mostly of quartz, alkali feldspar, and plagioclase. It forms from magma with a high content of silica and alkali metal oxides that slowly coo ...
, and is host to a number of workable rocks:
jasper Jasper, an aggregate of microgranular quartz and/or cryptocrystalline chalcedony and other mineral phases, is an opaque, impure variety of silica, usually red, yellow, brown or green in color; and rarely blue. The common red color is due to ...
,
quartzite Quartzite is a hard, non- foliated metamorphic rock that was originally pure quartz sandstone.Essentials of Geology, 3rd Edition, Stephen Marshak, p 182 Sandstone is converted into quartzite through heating and pressure usually related to tecton ...
,
chalcedony Chalcedony ( or ) is a cryptocrystalline form of silica, composed of very fine intergrowths of quartz and moganite. These are both silica minerals, but they differ in that quartz has a trigonal crystal structure, while moganite is monoclinic ...
, and others.


Microlithic sites at Adrar Bous

Surrounding the Adrar Bous Massif, several occurrences of diatomites yielded small stone tools and other artifacts, as well as the remains of aquatic and amphibious animals. Among the stone tools, scraper-type utensils were the most frequently found.


Adrar Bous III ( Missions Berliet)

A site lying to the southeast of the main massif yielding a larger amount of truncated blades and crescent-shaped microlithic tools than other nearby sites. Whether or not it was inhabited at the same time as the other Tenerian formations is under debate, as its tools appear to be slightly older than those found at other sites nearby.


Adrar n'Kiffi (The Mountain of Fish)

A site lying south of the main massif, Adrar n'Kiffi, shows the remnants of a lake, with a number of tools made of bone and stone including a stone harpoon and some dotted wavy-line pottery, as well as amphibious and fish-like remains. It is the namesake of the Kiffian technocomplex.


Agorass n'Tast (Valley of the Cow)

A site lying to the west of the main massif, Agorass n'Tast, did not contain as many Kiffian remains as the other sites but boasts a spate of Tenerian artifacts and fauna, including many pieces of pottery, and the later noted Adrar Bous cow. There is a measurable point in this area where the frequency of artifacts lessens significantly, possibly delineating the outskirts of a settlement. There are also stone circles within this settlement, thought to be used for wind shelter.


Agorass n'Tchissikian (Valley of Tombs)

A site lying to the north of the main massif, Agorass n'Tchissikian, is south of the Well Area. This site contains a number of potsherds, as well as a number of
tumuli A tumulus (: tumuli) is a mound of Soil, earth and Rock (geology), stones raised over a grave or graves. Tumuli are also known as barrows, burial mounds, mounds, howes, or in Siberia and Central Asia as ''kurgans'', and may be found through ...
. Two of the burials located there have been recovered. They were discovered to have been relocated to Cambridge, England, where all of their skulls were found to be missing and have not yet been located.


Diatomite 1/Gisement 10

A small site southeast of the main massif, Diatomite 1/Gisement 10, is dated to about 9130-9030 BP. This site contained several terrestrial Kiffian fauna, as well as some aquatic specimens from the same time period.


Well Area

Lying to the north of the main massif, the Well Area site yielded similar tools to Diatomite 1/Gisement 10, without indication of a lake. It contains many similar artifacts to Diatomite 1 and Adrar n'Kiffi.


Pastoral Neolithic herders at Adrar Bous

A number of Late Acheulean, Tenerian (~6950 – 4450 BP), and Kiffian (~9950 – 7950 BP) artifacts were discovered at Adrar Bous. Hand axes, found in highest number, were found among cleavers, adzes, and other objects. Adrar Bous also contains a number of faunal and human remains, dated to about 6,000 to 4,000 BP. The remains are diverse in terms of
taxonomy image:Hierarchical clustering diagram.png, 280px, Generalized scheme of taxonomy Taxonomy is a practice and science concerned with classification or categorization. Typically, there are two parts to it: the development of an underlying scheme o ...
and time period.


Faunal remains

A number of faunal remains were found at Adrar Bous, ranging from the Aterian to the Tenerian, and into the Neolithic. The Aterian specimens showed aging and mineralization most frequently, followed by the Kiffian and Tenerian specimens, respectively. Of the Aterian faunal remains, there are mostly indeterminate mammalian fossils and members of the '' Clariidae'' taxa, as well as four
hippopotamus The hippopotamus (''Hippopotamus amphibius;'' ; : hippopotamuses), often shortened to hippo (: hippos), further qualified as the common hippopotamus, Nile hippopotamus and river hippopotamus, is a large semiaquatic mammal native to sub-Sahar ...
specimens and one indeterminate large mammal. The Kiffian remains (derived from Adrar n'Kiffi and Diatomite 1) include a larger variety of both Mammalian and fish-like fossils, including members of the genera ''
Bovini The tribe Bovini or wild cattle are medium to massive bovines that are native to Eurasia, North America, and Africa. These include the enigmatic, antelope-like saola, the African and Asiatic buffaloes, and a clade that consists of bison and the ...
'' (cows), '' Syondontis'' (tigerfish), and '' Sus'' (wild boar), among other native African fauna. The boar specimen extracted from Diatomite 1 had significantly longer teeth than its modern counterpart. The Tenerian faunal remains showed by far the most taxonomic diversity, with the bulk of researched specimens being mammals. Nearly half of the cataloged remains belonged to domestic cattle specifically of the '' Bos'' genus, some of whose bones were burnt likely by human cohabitants.


The Adrar Bous cow

A notable find in Adrar Bous is that of a young, fully articulated cow skeleton, discovered in 1976 on an exploration by Carter and Clark. The cow skeleton has been dated to 4145±45 BP, a time when there was a concentrated focus on pastoralism in the area. Its bone structure describes it as a small, short-horned West African cow. Its presence at Adrar Bous helps to delineate the adaptation of pastoral practices to African climates.


Human remains

There were four human burials recovered from Adrar Bous, two of which were discovered at Agorass n'Tast. Several burials were found with ornamentation, such as shells and beaded necklaces. One burial is represented only by a fragment of the skull. One of the individuals excavated from Adrar Bous shows
spina bifida Spina bifida (SB; ; Latin for 'split spine') is a birth defect in which there is incomplete closing of the vertebral column, spine and the meninges, membranes around the spinal cord during embryonic development, early development in pregnancy. T ...
of indeterminate type, as well as
osteoarthritis Osteoarthritis is a type of degenerative joint disease that results from breakdown of articular cartilage, joint cartilage and underlying bone. A form of arthritis, it is believed to be the fourth leading cause of disability in the world, affect ...
in the knees and back.


See also

* Gobero


References

{{Authority control Archaeological sites in Niger Mountains of Niger Archaeology of West Africa Archaeological sites of Western Africa Ring dikes