Paul E. Lovejoy
Auteur de Transformations in Slavery: A History of Slavery in Africa
A propos de l'auteur
Paul E. Lovejoy is Distinguished Research Professor at York University and a Fellow of the Royal Society of Canada. He was the founding director of the Harriet Tubman Institute at York University and has published more than thirty books.
Crédit image: Paul E. Lovejoy
Œuvres de Paul E. Lovejoy
Salt of the Desert Sun: A History of Salt Production and Trade in the Central Sudan (African Studies) (1986) 5 exemplaires
Hugh Clapperton into the Interior of Africa: Records of the Second Expedition, 1825-1827 (Sources for African History) (2005) 3 exemplaires
The transatlantic slave trade and slavery : new directions in teaching and learning (2012) 3 exemplaires
Oeuvres associées
In Resistance: Studies in African, Caribbean, and Afro-American History (1986) — Contributeur — 13 exemplaires
Étiqueté
Partage des connaissances
- Nom légal
- Lovejoy, Paul Ellsworth
- Date de naissance
- 1943-05-06
- Sexe
- male
- Nationalité
- USA
- Lieu de naissance
- Girard, Pennsylvania, USA
- Études
- Clarkson College of Technology (B.Sc.)
University of Wisconsin (M.Sc.)
University of Wisconsin (Ph.D.) - Professions
- Canada Professor of African Diaspora History
- Organisations
- York University
Harriet Tubman Institute for Research on the Global Migrations of African Peoples
UNESCO - Prix et distinctions
- Canada Research Chair (African Diaspora History)
Fellow of the Royal Society of Canada
Membres
Critiques
Listes
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Auteurs associés
Statistiques
- Œuvres
- 17
- Aussi par
- 2
- Membres
- 192
- Popularité
- #113,797
- Évaluation
- 3.3
- Critiques
- 1
- ISBN
- 55
- Langues
- 2
"The evidence establishes clearly that Kawar was once the basin of a great lake which probably stretched 120 km north of Bilma and 20 km westward from the cliff. The lake may have extended further south than Bilma, perhaps having an outlet in that direction. The great lake was at its fullest more than 10,000 years ago: the desiccation of the region gradually resulted in its contraction, a process which probably took several hundred years before the water was confined to the basins at Bilma and elsewhere in Kawar. The contraction resulted in the concentration of salt through precipitation, which accounts for the salt layers in the cliff at Bilma and elsewhere in the Kawar region....
"The salt at the bottom of the depressions - the salt which has been actually exploited for commercial purposes for at least the past millennium - traces its origin to a later development. After the disappearance of the great lake, smaller lakes continued to occupy the depressions at Bilma, Dirku, Seguidine and elsewhere in Kawar. ...The drainage of the surrounding countryside reconcentrated salt in these smaller lakes. The salt inflow included some of the eroded deposits from the great lake but other salt too. Faure estimates that these later deposits, occurring over many thousands of years, could have resulted in accumulation of 500 tonnes of salt per year. The total deposit was certainly of the order of another million tonnes and perhaps as much as 3 million tonnes.
"These reserves provide the basis of the salt industry." pp. 39-40… (plus d'informations)