Toward a quantitative definition of mechanical units: New techniques and results from an outcropping deep-water turbidite succession (Tanqua-Karoo Basin, South Africa)

AAPG Bulletin ◽  
2007 ◽  
Vol 91 (8) ◽  
pp. 1085-1098 ◽  
Author(s):  
G. Bertotti ◽  
N. Hardebol ◽  
J. K. Taal-van Koppen ◽  
S. M. Luthi
2018 ◽  
Vol 130 (9-10) ◽  
pp. 1723-1746 ◽  
Author(s):  
Hannah L. Brooks ◽  
David M. Hodgson ◽  
Rufus L. Brunt ◽  
Jeff Peakall ◽  
Menno Hofstra ◽  
...  

2007 ◽  
Vol 77 (11) ◽  
pp. 901-908 ◽  
Author(s):  
A. Fildani ◽  
N. J. Drinkwater ◽  
A. Weislogel ◽  
T. McHargue ◽  
D. M. Hodgson ◽  
...  

2017 ◽  
Vol 120 (3) ◽  
pp. 433-446
Author(s):  
H. de V. Wickens ◽  
D.I. Cole

Abstract The Middle Permian Skoorsteenberg Formation is part of the Ecca Group (Karoo Supergroup) of South Africa. It is also known as the ‘Tanqua fan complex’ due to its origin as a deep-water sedimentation unit associated with a prograding deltaic system. The Skoorsteenberg Formation crops out over approximately 650 km2 along the western margin of the Main Karoo Basin. It thins out in a northerly and easterly direction and therefore has a limited extent with cut-off boundaries to the south and north. It is underlain by the Tierberg Formation and overlain by the Kookfontein Formation, the latter being limited to the regional distribution of the Skoorsteenberg Formation. The Skoorsteenberg Formation has a composite thickness of 400 m and comprises five individual sandstone packages, separated by shale units of similar thickness. The sandstones are very fine- to fine-grained, light greyish to bluish grey when fresh, poorly sorted and lack primary porosity and permeability. The Tanqua fan complex is regarded as one of the world’s best examples of an ancient basin floor to slope fan complex associated with a fluvially dominated deltaic system. It has served as analogue for many deep-water systems around the world and continues to be a most sought after “open-air laboratory” for studying the nature of fine-grained, deep-water sedimentation. The fan systems are essentially tectonically undeformed, outstandingly well exposed and contain an inexhaustible amount of information on the deep-water architecture of lower slope to basin floor turbidite deposits.


2009 ◽  
Vol 26 (3) ◽  
pp. i-xi
Author(s):  
Ali A. Mazrui

Sub-Saharan Africa is often regarded as part of the periphery, rather thanpart of the center, of the Muslim world. In the Abrahamic world, Africa isoften marginalized. But is there anything special about Islam’s relationshipwith Africa? Are there unique aspects of African Islam? Islam has exerted anenormous influence upon Africa and its peoples; but has Africa had anyimpact upon Islam? While the impressive range of articles presented in thisspecial issue do not directly address such questions, my short editorialattempts to put those articles within the context of Africa’s uniqueness in theannals of Islam. One note: Although these articles concentrate on sub-Saharan Africa (“Black Africa”), our definition of Africa encompasses thecontinent as a whole – from South Africa to Egypt, Angola to Algeria, andMozambique to Mauritania ...


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