During the course of an investigation to evaluate the area for mapping distribution of deposits , different proposed hydraulic structures and construct ion materials.Terraces within the Valley of the River Tigris were mapped at three locations in northern Iraq. Four stages, ranging in age from pleistocene to Recent have been recognized.The paper reveiws previous work concern ing these terrace deposits and describes the mapping work. The geomorphology of terraces is discussed with reference. to the evaluation of the river System. Finally some preliminary geotechnical data concerning the sediments are presented and discussed .

Neotectonic evidences were detected along Kirkuk-Najd-fault system that passes towards N45W along Guwair anticline, Humaira, Hawi Aslan, Zanquba and Mosul city through the Tigris River belt passing towards Iraqi-Syrian-Turkish borders. Ninivite persists through these localities. Two sets of slickensides forming two shear movements, restricting two acute angles 60 o and 32 o respectively, have their clear imprints on the newly formed Ninivite.Geochemical work concerning oxides distribution and element movements enrolled mainly by pH declinations through sample distribution assured the structural imprint of slickensides on a Ninivite rock on sample distribution covering unaltered and altered phases. Two main alteration events were picked up through samples 14 and 16 respectively. These events marked H 2 S and CH 4 gas seepages produced as a result of any newly detected seismic activities. The analysis of stress refers to the N45W i.e. rejuvenation of Kirkuk-Najd fault system. During alteration, SiO 2 enriched, while CaO, CO 2 , SO 3 , L.O.I, P 2 O 5 , were depleted and Al 2 O 3 and Fe 2 O 3 were migrated and eventually concentrated in the outer zones to form Alunite and Jarosite respectively.The same behavior applied to the trace elements, many of them were redistributed and concentrated after alteration like; Ni, Co, Zn, Ce, Y, and Li. Other trace elements are depleted like; Cr, Ag, Pb, and Cu.

This work includes the preparation of aerial photogeological map and the study of many geological profiles. It also involves the study of stratigraphical division and correlations of the exposed bedrocks at Butmah-East and Raven anticlines, particularly the Fat'ha Formation near Mosul Dam northern Iraq.It is evident that the sinkholes persisting through the area in question were initiated primarily within the upper part of the upper member of Fat'ha Formation. These were produced from the dissolution of thick gypsum beds in addition to the structural interplay and intersections of lineaments and faults. It can be concluded that the recent sinkhole in the tourist city is a product of faults crossing and the study could predict a new sinkhole development about 200m to the southeast of the present one.

The last four decades weather forecasting data marks the precipitation declination and increase dry years, in addition to the desertification migration on the west and northwestern Mosul city. This led to studying the Al-Shor Wadi area to try to make use of the karstic spring water flow through it and to harvest the rainfall flow water. These need to select the best site to construct a dam taking into consideration the geological and geotechnical characteristics of both dam site and lake behind. The dam site appears to be appropriate relying on the large thickness and frequencies of the marl bed, the restriction of gypsum bed thicknesses and frequencies as well as, of the approximate nill karstification.

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