International Journal of New Technology and Research (IJNTR) ISSN:2454-4116, Volume-2, Issue-2, February 2016 Pages 19-33 19 www.ijntr.org Abstract— The accretion and breakup of supercontinent would form the dominant control on the geographic position and timing of all tectonically intercede activity, and would there by profoundly influenced the tectonostratigraphic record of an area. This paper is summarized and discussed in detail the tectonostratigraphic events that correspond to the stratigraphic evolution in Yemen. In light of previous literatures papers, and proposed models of the formation of earth attempted has been made to re-arrange and re-ordered in a manner that be affected by or controlled by tectonics events and re-shaped formation in favor of these events. The objective of this paper is to elucidated the tectonostratigraphic of Yemen started from the Neoproterozoic time, when west Gondwana and east Gondwana collide ahead to the separation of India from afro-Arabia, ultimately to the last event represented by the opening of Gulf of Aden and Red sea and subsequent basins formed in or related to these events. All these events are effected the gross sedimentary accumulation, depositional environment and thickness of stratigraphy of Yemen. Index Terms—Tectonostratigraphy, Geological evolution, Tectonic environment, Yemen. I. INTRODUCTION The stratigraphic manners in which The Sedimentological characters of sedimentary rocks i.e environment, sediment transport agencies and the nature of the syn to post depositional tectonic activities modify the stratigraphic order of deposition are significant in terms of their depositional environment, the thickness of the formations and primary structures. Since the tectonics related to stratigraphy are manifested in the distribution of sediments in Yemen. We try to trace these effects to better understanding and generalized the geological evolution of Yemen. II. THE PAN-AFRICAN OROGENY EVENT The pan-African orogeny was a series of prominent Neoproterozoic orogenic belts , which related to the formation of supercontinents, caused mechanisms are not well understood till now.This Orogeny is developed due to collision of East Gondwana and West Gondwana in Neoproterozoic time. Then developed as suture zone between East Gondwana and West Gondwana, the northern part of this orogeny is represent the Arabian Nubian Shield, whereas the M. Albaroot, Department Of Geology, Aligarh Muslim University, Aligarh- A.H.M. Ahmad, Department Of Geology, Aligarh Muslim University, Aligarh- Nabil Al-Areeq, Department Of Geology, Thamar University, Thamar, Yemen Repblic M. Sultan, Department Of Geology, Aligarh Muslim University, Aligarh- southern part represent Pan-African Orogeny .This orogeny is participated to some extent to the geology of Yemen as following. The basement rocks of Yemen is considered a part of the Arabian shield which can be divided into five terranes. Asir terrane, Abbas terrane, Al Bayda terrane, Al Mahfid terrane and Al Mukalla terrane.They arrange in manner that reflect the magnitude of tectonic process in time and space. Two of them represent island arcs which are abducted to continental crust, the Al Bayda terrane, and Al Mukalla terrane. The remaining three others form Archean to Proterozoic gneissic terranes, the Abbas terrane, Asir terrane and the Al Mahfid terrane. During Ordovician the sediments were transported from southwest to northeast as deduced from the abundant cross bedding structure, in both facies of Wajid Sandstone in Saudi Arabia, dated to be of Ordovician age, towards what is know the center of the Arabian shield. The Wajid sandstones is present only in the northern Yemen, particularly north Sa‟dah governorate and east, north Al Jawf governorate. Presumably, the paleoslope of the region was towards the northern-east as indicated from two lines of evidence, i.e. increase in thickness of Wajid sandstone toward north-east, second is the absence of this formation in southern Yemen.Due to tectonic uplift event in mid Carboniferous that related to merging of Laurasia and Gondwanaland to compose Pangea, ice sheet developed on uplift places and sediments of glacial origin were accumulated in Yemen represent by Akbarah formation. This formation is completely absent from east Yemen, but exists in northern Yemen.Overlying Akbarah Formation is the Kuhlan Formation which represents fluvial to nearshore depositional environment. It is widespread with small scale outcrops through Yemen. The well knownstrata type section of this formation is in Hajjah(Kuhlan village). The thickness varies considerably in peneplained floor at the time of deposition. The Kuhlan Formation is overlain by dolomite/limestone of Shuqra Formation which was part of a wider Tethys ocean shelf on the passive margin of Arabian shield. Tectonostratigraphy of Yemen And Geological Evolution: A New Prospective M. Albaroot, A.H.M. Ahmad, Nabil Al-Areeq, M. Sultan