Changes

Four major tectonic features were produced by the Pan-African event in Libya: the western Tihemboka Uplift, the west-central Tripoli-Tibesti Uplift, the central Haruj Uplift, and the eastern Calanscio-Awaynat Uplift ([[:file:M106Ch04Fig2A.jpg|Figure 2A]]). From west to east, these ridge-like structures are separated by the Murzuq-Jadu, Dur Al Qussah-Uri, and Calanscio troughs ([[:file:M106Ch04Fig2A.jpg|Figure 2A]]). Cambrian to Carboniferous seas transgressed into these northwest-trending troughs from the northwest. Thus the stratigraphic section thins to the southwest; a thicker marine sequence accumulated north of Libya, whereas farther south, continental siliciclastic sediments prevailed. Some continental deposits reported to the north probably accumulated during marine regressions.<ref name=Zegaar_1986>Zegaar, N., 1986, Stratigraphic and tectonic evolution of the desert of northwestern Egypt and northeastern Libya, unpublished MSC thesis, University of South Carolina.</ref>

Four major tectonic features were produced by the Pan-African event in Libya: the western Tihemboka Uplift, the west-central Tripoli-Tibesti Uplift, the central Haruj Uplift, and the eastern Calanscio-Awaynat Uplift ([[:file:M106Ch04Fig2A.jpg|Figure 2A]]). From west to east, these ridge-like structures are separated by the Murzuq-Jadu, Dur Al Qussah-Uri, and Calanscio troughs ([[:file:M106Ch04Fig2A.jpg|Figure 2A]]). Cambrian to Carboniferous seas transgressed into these northwest-trending troughs from the northwest. Thus the stratigraphic section thins to the southwest; a thicker marine sequence accumulated north of Libya, whereas farther south, continental siliciclastic sediments prevailed. Some continental deposits reported to the north probably accumulated during marine regressions.<ref name=Zegaar_1986>Zegaar, N., 1986, Stratigraphic and tectonic evolution of the desert of northwestern Egypt and northeastern Libya, unpublished MSC thesis, University of South Carolina.</ref>

During the Late Carboniferous Hercynian Orogeny, Laurasia collided with Gondwana, an event that resulted in regional uplift associated with partial reactivation of Pan-African faults. This orogeny changed the structural framework of Libya and resulted in the development of new northeast-trending tectonic elements ([[:file:M106Ch04Fig2B.jpg|Figure 2B]]): the Sirt Arch in central Libya separating the Al Kufrah Basin from the Murzuq Basin, the Ennedi-Awaynat Uplift in the southern Al Kufrah Basin, and the Gargaf High in the southern Ghadamis Basin.

During the Late Carboniferous Hercynian Orogeny, Laurasia collided with Gondwana, an event that resulted in regional uplift associated with partial reactivation of Pan-African faults. This [[orogeny]] changed the structural framework of Libya and resulted in the development of new northeast-trending tectonic elements ([[:file:M106Ch04Fig2B.jpg|Figure 2B]]): the Sirt Arch in central Libya separating the Al Kufrah Basin from the Murzuq Basin, the Ennedi-Awaynat Uplift in the southern Al Kufrah Basin, and the Gargaf High in the southern Ghadamis Basin.

During the Mesozoic breakup of Gondwana, deep-seated rifting and widespread Tethys marine transgression occurred across northern Africa as the central Atlantic opened in the west and the Tethys opened to the east. The timing and orientation of rifting varied from basin to basin. For example, the initial Sirt Basin rifting commenced in the Early Cretaceous, whereas the Suez rifting occurred in the Tertiary.

During the Mesozoic breakup of Gondwana, deep-seated rifting and widespread Tethys marine transgression occurred across northern Africa as the central Atlantic opened in the west and the Tethys opened to the east. The timing and orientation of rifting varied from basin to basin. For example, the initial Sirt Basin rifting commenced in the Early Cretaceous, whereas the Suez rifting occurred in the Tertiary.