tawfeek.mahran

Tawfiq Mohamed Mahran

Professor - أستاذ

Faculty of science

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

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Publications Which contain the keyword: siliciclastics

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

2018-09-23 08:57:16 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

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

2018-09-06 15:14:54 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

2018-09-06 15:33:15 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

2018-09-06 15:52:08 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

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

2018-09-06 16:13:20 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

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