Abstract
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.
Highlights
Little works have been carried out on the geology of the investigated area, and many stratigraphical, sedimentational, structural and geomorphological problems have not yet been investigated
The method of present work depends on geomorphological interpretation of base map on scale 1:40000
It is quite obvious that these sinkholes persist within the upper part of the lower member of Fat'ha Formation i.e., within the top part of M2 (Fig. 4)
Summary
Little works have been carried out on the geology of the investigated area, and many stratigraphical, sedimentational, structural and geomorphological problems have not yet been investigated. No one has yet done detailed geological work for the area except Al-Haddithi (1990). In addition the previous and recent works dealing with regional geological and geomorphological mapping, like Taufiq and Domas (1977) Alsaigh (1991), Al-Ezzi (1991), AL-Daghastani, and AL-Daghastani (1992) respectively, or dealing with specific problem with small area at dam site such as AL-Ansari et al, (1985), Al-Ansari and Gayra (1986), and AL-Juraisy (1992). The main purpose of the present work is to throw light on the geology, and to show the impact of some geologic structural and geomorphological elements on the fuse plug at southeastern part of Mosul dam. The fieldwork comprises geological map checking, and detailed description of lithological sections of the exposed geological formations
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