The New Encyclopaedia Britannica: Macropaedia: knowledge in depth. 19 vEncyclopaedia Britannica, Incorporated, 1981 - Encyclopedias and dictionaries |
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Page 182
... Sahara , and South West Africa . In Egypt and Arabia their presence has been revealed by drilling . Elsewhere they remain unknown . During the Ordovician Period ( from 500,000,000 to 430,000,000 years ago ) fossiliferous marine ...
... Sahara , and South West Africa . In Egypt and Arabia their presence has been revealed by drilling . Elsewhere they remain unknown . During the Ordovician Period ( from 500,000,000 to 430,000,000 years ago ) fossiliferous marine ...
Page 185
... Sahara and the Kalahari , which began about 3000 BC . PRESENT GEOLOGICAL STRUCTURES AND RELIEF Africa represents a magnificent example of the relation of geological structure to relief . In the north , the chains of the Atlas Mountains ...
... Sahara and the Kalahari , which began about 3000 BC . PRESENT GEOLOGICAL STRUCTURES AND RELIEF Africa represents a magnificent example of the relation of geological structure to relief . In the north , the chains of the Atlas Mountains ...
Page 282
... Sahara , eastern and southern Africa , and else- where from about 5500 to 2500 BC , with the latter part of the period marked by extensive rock paintings such as at the Tassili site in the Sahara . In the West African for- ests ...
... Sahara , eastern and southern Africa , and else- where from about 5500 to 2500 BC , with the latter part of the period marked by extensive rock paintings such as at the Tassili site in the Sahara . In the West African for- ests ...
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19th century abrasive accelerator acid actinide actor Adams adhesives administrative adult advertising Aegean aerospace Aeschylus aesthetic Afghanistan agriculture aircraft airplane animals artist atomic Bantu Bantu languages basic behaviour Bronze Age Cameroon carved Central centre changes Chari-Nile languages coast Congo contains countries Cretan Crete crops cultural Cyclades dance Djibouti early East Egypt electrons engineering Ethiopia example farm feet figures flight Ghana important increase industry Kabul Kenya Khoisan Knossos known Lake land languages mainland major masks ment metal modern mountains Mycenae Niger Nigeria Nilotic northern organization oxidation particles patterns percent period plants political population production proton region River Sahara savanna sculpture soil solvent South Africa southern species style Sudan Tanzania temperature theory tion tons traditional tropical United usually West Africa western Yoruba Zaire