عنوان

The African erosion surface :

0813712017

9780813712017

b523384

The African erosion surface :

[Book]

a continental-scale synthesis of geomorphology, tectonics, and environmental change over the past 180 million years /

by Kevin Burke, Yanni Gunnell

Boulder, Colo. :

Geological Society of America,

2008

iv, 66 pages :

illustrations (some color), maps (some color) ;

29 cm

Memoir (Geological Society of America) ;

201

Includes bibliographical references

Abstract -- The unique tectonic identity of the African continent: expected effects on the history of its eroding land surface -- General characteristics of the African Surface -- What is the African Surface? -- The African Surface: a composite surface -- Tectonic evolution of Afro-Arabia and its controls on the history of the African Surface -- Structures that influenced local relief on the African Surface during its evolution -- The African Surface in basins that experienced marine incursions between 100- Ma and 34 Ma -- Regional characteristics of the African Surface -- The African Surface in its type area: southern Africa -- History of the concept of the African Surface -- Recent interpretations of the African Surface -- The African Surface in southern Africa: a summary -- West Africa: From Senegal to Cameroon -- Central Africa -- East Africa: the great swell and the rift system -- Northeastern Africa and Arabia -- Summary: regional age brackets for the African Surface

Bauxite occurrences as indices of the African Surface: their value and limitations -- Bauxites ... and bauxites -- Examples of orthobauxites and laterites in Afro-Arabia inherited from the last great bauxite-forming interval, 70-40 Ma -- Staircases of bauxite- and laterite-capped surfaces in their key area: West Africa -- Bauxites in Africa that may have formed since the end of the main bauxite-forming interval, i.e, after 40 Ma -- Synthesis on bauxites and laterites -- The imprint of continental-scale Paleoclimactic variations in Afro-Arabia -- Cretaceous times, 140-65 Ma -- Earlier Cenozoic times, 65-34 Ma -- Early Oligocene to late Pliocene times, 34-2.8 Ma -- Late Pliocene and Quaternary times, since 2.8 Ma -- The African Surface in the post-30 Ma basin-and-swell reference frame -- Burial of the African Surface in Africa's active continental basins -- Topographic uplift of the African Surface on Africa's swells -- Volcanism or absence thereof: its relevance to the African Surface

The African Surface on Africa's swells: general characteristics -- The Great Swell of South Africa -- Implications of the Cenozoic swell model for the history of the Great Escarpments at Africa's continental margins -- Long-lived escarpments close to rifted continental margins? a return to the historical type area of the African Surface in southern Africa -- A new perspective on the Great Escarpment of Southern Africa -- Summary and conclusions

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Erosion-- Africa

Evolutionary paleoecology-- Africa

Geology, Structural-- Africa

Morphotectonics-- Africa

Physical geography-- Africa

Burke, Kevin,1929-

Gunnell, Yanni,1965-

20080908011710.0

rda

[Book]

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