tawfeek.mahran

Tawfiq Mohamed Mahran

Professor - أستاذ

Faculty of science

Address: Geology Dept. - Faculty of Science- Sohag University

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  • Courses 7
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Facies, textural and mineralogical characteristics of Syn Rift Oligocene-Neogene siliciclastics south of Wadi Abu Ghusun, Red Sea coastal area:implications to provenance and paleoclimate

1999 | Keywords Neogene, siliciclastics, prove,
Facies, textural and mineralogical characteristics of Syn Rift Oligocene-Neogene siliciclastics south of Wadi Abu Ghusun, Red Sea coastal area:implications to provenance and paleoclimate
The area south of Wadi Abu ghusun exposes a complete section of Oligocene and Neogene sediments. The Oligocene, lower and Middle Miocene are confined to a narrow belt in the north, wheras the Upper Miocene, Pliocene and Plio-Pleistocene sediments are exposed in the rest of the area and cover a wide and elongate depression. Eight main lithofacies associations were distinguished: ... Read more

Late Oligocene lacustrine deposition of the Sodmin Formation, Abu Hammad Basin, Red Sea, Egypt: sedimentology and factors controlling palustrine carbonates

1999 | Keywords Half grabens, lacustrine, palustrine, Sodmin,
Late Oligocene lacustrine deposition of the Sodmin Formation, Abu Hammad Basin, Red Sea, Egypt: sedimentology and factors controlling palustrine carbonates
THE LATE OLIGOCENE LACUSTRINE SEQUENCE OF THE SODMIN FORMATION IS EXPOSED IN THE ABU HAMMAD BASIN, 27 KM WEST OF HAMRAWEIN. THE SODMIN FORMATION COMPRISES TWO MAIN LITHOSTRATIGRAPHICAL UNITS THAT ARE INTERPRETED TO REPRESENT THE INFILLING OF A CLOSED LAKE LOCATED WITHIN A DEXTRAL SHEAR SETTING THAT DEVELOPED IN ASSOCIATION WITH THE EARLIEST STAGE OF RIFTING OF THE RED SEA. ... Read more

Cyclicity in nakheil Formation((Oligocene), west of Quseir, Red Sea, Egypt

1997 | Keywords Nakheil, Oligocene, nonmarine,
Cyclicity in nakheil Formation((Oligocene), west of Quseir, Red Sea, Egypt
The nonmarine Oligocene Nakheil Formation was deposited in half-graben basin formed during the early rifting stage of the Red Sea basion. This formation shows cyclic organization composed of alluvial fans, fluvial and lacustrine deposits. paleocurrent data and lateral lithological variations indicate that the talus and alluvial fans were built outwards that flowed transverse to the basin axis. Lacustrine deposits were ... Read more

Tectonic and climatic control of the Egyptian Red Sea coastal outline and morphology: An overview

1996 | Keywords tectonic, climate, coastal,
Tectonic and climatic control of the Egyptian Red Sea coastal outline and morphology: An overview
Within the framework of IGCP Project 389 an overview of the main factors controlling the development of coastal outline and morphology of the Egyptian Red Sea and Southern Gulf of Suez is given. Understanding such factors, especially those affecting the region in relatively recent times, is a prerequisite for any future development projects. The Egyptian Red Sea coast is generally ... Read more

Evolution of Quaternary rift sediments in relation to the tectonic framework of the Egyptian Red Sea coastal area.

1995 | Keywords Red Sea, Quaternary, terraces, rift, reefs, siliciclastics,
Evolution of Quaternary rift sediments in relation to the tectonic framework of the Egyptian Red Sea coastal area.
THE QUATERNARY SEDIMENTS OUTCROPPING ALONG EGYPTIAN COAST OF THE RED SEA AREA ARE REPRESENTED BY A SERIES OF TERRACES INCLUDING A SEQUENCE OF MIXED SILICICLASTICS, REEFAL CARBONATES AND EVAPORITES. IN ADDITION TO SEA LEVEL CHANGES AND CLIMATIC CONDITIONS, TWO MAIN FACTORS CAUSED THE RAPID FACIES VARIATIONS OF THESE SEDIMENTS. THESE ARE THE EASTERLY TRENDING TECTONICALLY-CONTROLLED WADIS AND FRACTURES AND THE ... Read more

Mixed Late Oligocene-Middle Miocene siliciclastics-carbonates sedimentation in block-faulted regions: A Model from Wadi Wizr-Wadi Assal area, Red Sea coastal zone, Egypt

1995 | Keywords Siciclastics, carbonates, bloc,
Mixed Late Oligocene-Middle Miocene siliciclastics-carbonates sedimentation in block-faulted regions: A Model from Wadi Wizr-Wadi Assal area, Red Sea coastal zone, Egypt
The Late Oligocene- Middle Miocene rift sediments in Wadi Wizr-Wadi Assal area south of Quseir could be subdivided into four lithofacies: Facies A : Dominantly alluvial, coarse clastic, fans (Lower part of Ranga Formation). Facies B: Fluviatile coarse and fine siliciclastics, with marine evaporites near the top (upper part of Ranga Formation). Facies C: Open marine, mixed coralgal carbonate-siliciclastic sediments ... Read more

Sedimentological development of the Upper Pliocene-Pleistocene sediments in the areas of El salmony and El Sawamha Sharq, NE Sohag, Egypt

1995 | Keywords Nile Valley, terraces, Lacustr,
Sedimentological development of the Upper Pliocene-Pleistocene sediments in the areas of El salmony and El Sawamha Sharq, NE Sohag, Egypt
The Upper Pliocene- Pleistocene Nile sediments cropping out in the areas around El Salamony and El Sawamha Sharq constitute two terraces including five facies: Flood plain, talus and lacustrine facies in the upper terrace skirting the Eocene scarp and fluviatile (channels and flood plain) facies in the lower terrace near the cultivated land. Distribution and facies changes exhibited by these ... Read more

Some textural characteristics of Syn Rift Neogene and Quaternary siliciclastic sediments near Quseir area, Red Sea , Egypt.

1994 | Keywords Syn rift, siliciclastics, Quseir, Neogene, quternary, Formation, grabens,
Some textural characteristics of Syn Rift Neogene and Quaternary siliciclastic sediments near Quseir area, Red Sea , Egypt.
THE SYN RIFT NEOGENE-QUATERNARY SILICICLASTIC SEDIMENTS OUTCROPPING ALONG WADI SHARM EL BAHARI (SOUTH OF QUSEIR) BELONG TO RANGA, UM MAHARA, ABU DABBAB AND MARSA ALAM FORMATIONS AS WELL AS QUATERNARY DEPOSITS, INFILLING STRUCTURALLY-CONTROLLED GRABENS THAT HAVE BEEN GENERATED DURING RIFT TECTONICS. TWO TEXTURALLY DIFFERENT CONGLOMERATIC BEDS HAVE BEEN RECOGNIZED: CLAST AND MATRIX-SUPPORTED CONGLOMERATES. GRADING IS EXTREMELY COMMON IN THESE SEDIMENTS. ... Read more

Facies and sedimentary evolution of syn rift Middle Miocene-Pliocene sediments of Wadi Queih-wadi Um Aish area, south of Safaga, Red Sea

1994 | Keywords Red Sea, rift, sealed faults, talus, carbonatem platform, siliciclastics,
Facies and sedimentary evolution of syn rift Middle Miocene-Pliocene sediments of Wadi Queih-wadi Um Aish area, south of Safaga, Red Sea
THE MIDDLE MIOCENE-PLIOCENE SEDIMENTARY SEQUENCE CROPPING OUT IN THE AREA BETWEEN WADI QUEIH AND WADI UM AISH (SOUTH SAFAGA) IS SUBDIVIDED INTO FIVE UNITS: 1- UM MAHARA FM., 2- ABU DABBAB FORMATION, 3- UM GHEIG FM., 4- MARSA ALAM FM., AND 5- SHAGRA FM. DEVELOMENT OF THESE SEDIMENTS CLEARLY REFLECTS FOUR MAJOR STAGES OF TECTONO-SEDIMENTARY EVOLUTION. IN THE FIRST STAGE ... Read more

Sedimentology of Proto-rift Late Oligocene?-Lower Miocene sediments in the initiation grabens of the Red Sea area, Egypt

1994 | Keywords Prot rift, initiation grabens, talus, siliciclastics, hinterland, restricted, continental, open marine,
Sedimentology of Proto-rift Late Oligocene?-Lower Miocene sediments in the initiation grabens of the Red Sea area, Egypt
THE PROTO-RIFT LATE OLIGOCENE?-LOWER MIOCENE SEDIMENTS IN THE INITIATION GRABENS EXHIBIT MIXED SILICICLASTIC, CARBOATE AND EVAPORITE TRANSITIONS. DISTRIBUTION AND RAPID LATERAL AND VERTICAL FACIES CHANGES EXHIBITED BY THESE SEDIMENTS LED TO RECOGNITION OF THREE MODES OF DEPOSITION: (I) CONTINENTAL (LACUSTRINE AND ALLUVIAL FANS) SEDIMENTS (MODE 1), (II) CONTINENTAL (TALUS, CHANNELS AND ALLUVIAL FANS) AND RESTRICTED MARINE (EVAPORITE) SEDIMENTS (MODE 2) ... Read more