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Research Article| September 01, 2008 Cyrenaican “shock absorber” and associated inversion strain shadow in the collision zone of northeast Africa William Bosworth; William Bosworth 11Apache Egypt Companies, 11, Street 281, New Maadi, Cairo, Egypt Search for other works by this author on: GSW Google Scholar Ahmed S. El-Hawat; Ahmed S. El-Hawat 22University of Garyounis, P.O. Box 1308, Binghazi, Libya Search for other works by this author on: GSW Google Scholar Daniel E. Helgeson; Daniel E. Helgeson 11Apache Egypt Companies, 11, Street 281, New Maadi, Cairo, Egypt Search for other works by this author on: GSW Google Scholar Kevin Burke Kevin Burke 33Department of Geosciences, University of Houston, Houston, Texas 77204, USA Search for other works by this author on: GSW Google Scholar Geology (2008) 36 (9): 695–698. https://doi.org/10.1130/G24909A.1 Article history received: 28 Feb 2008 rev-recd: 07 May 2008 accepted: 17 May 2008 first online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation William Bosworth, Ahmed S. El-Hawat, Daniel E. Helgeson, Kevin Burke; Cyrenaican “shock absorber” and associated inversion strain shadow in the collision zone of northeast Africa. Geology 2008;; 36 (9): 695–698. doi: https://doi.org/10.1130/G24909A.1 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract Far-field compressional stresses resulting from arc collisions with the northeast coast of Africa-Arabia propagated across the African plate in the Santonian (ca. 84 Ma), and later similar pulses occurred through much of the Cenozoic. Waves of inversion-related features including folds, thrusts, and igneous activity developed during the compressional events. Structures generated were uneven in intensity and distribution, and were commonly concentrated in existing rifts. Because of the irregular shapes of the North African continental margin and associated inboard basins, Cyrenaica underwent the most severe shortening, although deformation extended eastward from Libya to the Levant. Areas south and southeast of Cyrenaica (the Sirt Basin and the far Western Desert of Egypt) underwent very little shortening because they occupied a regional strain shadow. The eastern region of the Western Desert and Sinai, which were not sheltered by the stress-absorbing Cyrenaica inversion, recorded strong compressional deformation synchronous with that in Cyrenaica. As closure of the Mediterranean continues, Cyrenaica will become an indenter comparable to those of other orogenic belts. The detailed tectonic evolution of individual northeast African basins has depended on their positions in relation to the Cyrenaican strain shadow. No single subsidence and paleostress history reflects the complete regional development of the converging Mediterranean–North African margin. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.