Our Beautiful World

The Danakil Depression and its people


The Afar Triangle (or the Afar- Dallol-or the Danakil-Depression) is a geological depression that is caused by the
Afar Triple Junction which is part of the Great Rift Valley. It overlaps Eritrea, Djibouti and the entire Afar Region of Ethiopia.



The Afar Triangle includes the Danakil Depression and the lowest point in Africa, Lake Asal (155 metres below sea level),
lies in Djibouti. Only the Awash River flows into the area, where it ends in a chain of lakes that increase in salinity.
The Awash River, flowing north-eastward through southern Afar, provides a narrow green belt and enables life for
the flora and fauna in the area and for the Afars, the nomadic people living in the Danakil desert.

The lowlands of the Afar Depression are affected by heat and drought. There is no rain for most of the year, and yearly
rainfall averages range from 100 to 200 millimetres (4 to 7 in), with less rain falling closer to the coast.

Dallol (upper north) is also part of the depression, one of the hottest places year-round anywhere on Earth. The climate
varies from around 25 °C (77 °F) during the rainy season (September–March) to 48 °C (118 °F) during the dry
season (March–September).

About 128 kilometres (80 mi) from the Red Sea, the Awash ends in a chain of salt lakes, where its water evaporates
as quickly as it is supplied. About 1,200 km2 (460 sq mi) of the Afar Depression is covered by salt, and salt mining is
still a major source of income for many Afar tribes.
See Nabro volcano.



Perspective image of the Afar Depression
http://en.wikipedia.org/wiki/File:AfarDrape.jpg
This file is licensed under the Creative Commons Attribution 2.0 Generic license



Beisa Oryx (Oryx gazella beisa), side view, Samburu National Reserve, Kenya.
Common Beisa Oryx (Oryx beisa beisa) found in steppe and semi-desert throughout
the Horn of Africa and north of the Tana River
Photo:ChrisHodgesUK
This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license

The Afar Depression biome is characterized as desert scrubland. Vegetation is mostly confined to drought-resistant plants
such as small trees (e.g. species of the dragon tree), shrubs, and grasses. Wildlife includes many herbivores such as
Grevy's Zebra, Soemmering’s Gazelle, Oryx Beisa (picture above) and, notably, the last viable population of
African wild ass, Equus africanus somalicus, (picture below.).


Somali Wild Ass (Equus africanus somalicus) in captivity at San Diego Zoo, San Diego, California, USA.
Photographed on 3 June 2002

This file is licensed under the Creative Commons Attribution-NonCommercial-ShareAlike 2.0 Generic


Archer's lark, Heteromirafra archeri

There have been no confirmed sightings of this species since 1955 despite some recent searches, suggesting
that it now has an extremely small population and range. These are likely to be declining, owing to ongoing
habitat degradation. For these reasons it is classified as Critically Endangered. It is probably still extant because
the lack of records is likely to be partly a consequence of its secretive habits and the fairly restricted nature
of recent surveys.

BirdLife International (2011) Species factsheet: Heteromirafra archeri.
Downloaded from http://www.birdlife.org on 31/12/2011.

Birds include the ostrich, the endemic Archer's lark, Heteromirafra archeri, (picture above) the Secretary Bird,
Arabian and Kori bustards, Abyssinian Roller and Crested Francolin (picture below). In the southern part of the plain,
in Ethiopia, lies the Mille-Sardo Wildlife Reserve (established 1973).




Crested Francolin, Francolinus sephaena, at Kruger National Park, South Africa
Photo: Dick Daniels (http://carolinabirds.org/)
This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license

A bird singing. Paraa Lodge, Murchison Falls NP, Uganda (ssp grantii).
Recorded 29 August 2006
http://www.youtube.com/watch?v=9bTqqWr_VtU

The Crested Francolin, Dendroperdix sephaena, is a species of bird in the Phasianidae family. It is found in Angola,
Botswana, Democratic Republic of the Congo, Ethiopia, Kenya, Malawi, Mozambique, Namibia, Somalia,
South Africa, Sudan, Swaziland, Tanzania, Uganda, Zambia, and Zimbabwe.

The Afar Depression is the product of a tectonic triple junction (the Afar Triple Junction), where the spreading ridges
that form the Red Sea and the Gulf of Aden emerge on land and meet the East African Rift. The central meeting place for
these three pieces of Earth's crust is around Lake Abbe. The Afar Depression is one of two places on Earth where a
mid-ocean ridge can be studied on land, the other being Iceland.

In the Depression, the Earth's crust is slowly rifting apart at a rate of 1–2 centimetres (0.4–0.8 in) per year along each
of the three rifts which form the "legs" of the triple junction. The immediate consequence of this is that there are
(as of late 2005) a continuous sequence of earthquakes, fissures hundreds of metres long and deep appearing in the ground,
and the valley floor sinking as much as 100 metres. Between September and October 2005, 163 earthquakes of magnitudes
greater than 3.9 and a volcanic eruption occurred within the Afar rift at the Dabbahu and Erta Ale volcanoes. 2.5 cubic
kilometers of molten rock was injected into the plate along a dyke between depths of 2 and 9 km, forcing open an 8 meter
wide gap on the surface, known as the Dabbahu fissure. Related eruptions have taken place in Teru and Aura woredas
. The rift has recently been recorded by means of three-dimensional laser mapping.



Erta Ale is an active shield volcano located in the Afar Region of northeastern
Ethiopia, within the Danakil Desert. It is the most active volcano in Ethiopia
.
http://www.flickr.com/photos/26162032@N03/2455969983/
This file is licensed under the Creative Commons Attribution-Share Alike 2.0 Generic license


The floor of the Afar Depression is composed of lava, mostly basalt. One of Earth's five lava lakes, Erta Ale is found here,
as well as Dabbahu Volcano. It has been proposed that the Afar Depression is underlain by a mantle plume,
a great upwelling of mantle that melts to yield basalt as it approaches the surface.


Dallol Depression
The Dallol Depression, also called Danakil Depression, is a desert with some areas that are more than 100
meters (328 feet) below sea level. This is special because it is one of the lowest points on earth not covered by
water. There are hot yellow sulfur fields among the sparkling white salt beds. Heat isn't the only thing people
feel in the Dallol Depression. Alarming earth tremors are frequently felt. There are also several active volcanoes
. So just how hot is it at the Dallol Depression? Temperatures can reach as high as 145 degrees Fahrenheit
(63 degrees Celsius) in the sun
http://www.kidzworld.com/article/1203-extreme-climates-3-hottest-place#ixzz1i6pWFlX3

Sulphur pools and rock formations near Dallol
http://www.youtube.com/watch?v=7HxLbFdu8Jg&feature=related




Stark saline cliffs left by an ancient arm of the Red Sea and carved by its waves,
just above shallow Lake Karum.

The People.
The Afar-people is a Hamitic people that have lived here for thousand of years. They numbers about 250.000 (1970)

   

Left: A woman and child of the Danakil.
Right: Braids and ornate costume show her to be the unwed daughter of a wealthy man.

Restling camels park behind those handsome Danakil-girls in a market of the highlandtown of Batie.
Caucasian features, in some cases blended with Negro, characterize the Danakils,
a Hamatic people linked by legend to the Biblical sons of Ham, son of Noah, from whom we all descend.


A pole in each hand, miners pry loose slabs of solid salt from the drying bed of Lake Karum.

Readymade bricks of salt - and loading salt for transport by camels.
© http://ai.stanford.edu/~latombe/mountain/photo/ethiopia/danakil.htm



Later they are sliced into manageable bricks, that lure an endless procession
of salt caravans, Here near the village of Bohale, bound for the provincial
capital, Makale..

Although Ethiopians who live on the more heavily populated plateau sometimes come down to the lowlands to mine salt,
most of this work is done by Danakil, who over the centuries have grown used to the fearful heat.
The salt beds themselves were created over millennims by the evaporation of sea water, geologists have determined that
this area was once an arm of the Red Sea. No one has ever probed to the bottom of Lake Karum's salt deposits,
but estimates of their depth run to 5 kilometers or more....They provide pure white, ready -to-use salt for a large area
of northeastern Africa.

Mobile home on a sea of ash. Oblivious to a kid browsing inside their house, nomads rest on a slope of
volcanic debris. Goatskins and straw mats for extra roofing lie beside the brush igloo.
When water and forage run short, the family will bundle the callapsible shelter onto a camel and move on.

Barren plain sprouts new houses near Tandabo. Each dwelling contains
a kitchen, and many have bath-luxuries previously uunknown.
Government holds demonstrations on cultivating cotton. Houses, fields
and training may be had for the asking by any landless Ethiopian.
Yet there are few takers among th Danakil, a people unwilling to
forsake the desert's hard freedom

Some Danakil, it is true, have been more or less settled for a very long time. Their villages stretch along the Awash River,
from Aisaita to Lake Gamarri. Near Aisaita they cultivate cotton, but elsewhere along the river, cotton gradually gives
way to corn and sesame.



Trailing evenings shadows, goats trot purposefully past their herder, bound for a water hole.

The People here live in the same easily assembled brushwood huts as do the nomads, from whom they are indistinguishable
to an outsider. Like nomads, they also own herds of cattle, camels, sheep and goats. Both the settle and the nomadic
Danakil eat meat only on rare occasions, preferring to conserve their livestock as precious capital.


On the move in the time-honored manner, Danakil lead camels
laden with hut poles and all their worldy goods.

The part about The People are from National Geographic, February, 1970, Vol.137, No.2, by Victor Eglebert,
who also have taken the above photos, except 'cottonpicker' and 'unwed daughter'. and where otherwise are mentioned.



Women from the Danakil area.
© http://ai.stanford.edu/~latombe/mountain/photo/ethiopia/danakil.htm



Children are the same, all over the world. Don't you agree?
© pbOOg.cOm / Children from Ahmed Ela

 


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ANIMALS

over 250

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BIRDS

over 500

flower.jpg
FLOWERS

over 225
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