Early paleozoic sediments of the Zagros-Taurus-ranges

Efficiency of Oil and Gas Generation of Palaeozoic Formation Outcrops in Nazdur Area, Kurdistan Region, Northern Iraq: Insights From Palynological Study

“…Due to the same break and erosion, the lower Silurian 65m thick shale in the Akkas-1 Well (Aqrawi, 1998 andLoydell et al, 2013) which is believed to be the main Palaeozoic source rock in the western and southwestern Iraq (Aqrawi, 1998 andMajidee, 1999) and is obscured in the studied area. Additionally, the high amount of Ordovician and Silurian sediments was eroded because they outcropped in the western part in Early Jurassic (Al-Ahmed, 2007 (Sloss &Speed, 1974 andSadek, 1977). The Late Devonian-Early Carboniferous formations are composed of siliciclastic-carbonate facies and lately combined in the Khleisia Group (Al-Hadidy, 2007;Al-Juboury and Al-Hadidy, 2009).…”

“…The Palaeozoic formations in Iraqi Kurdistan can be assembled to three different sedimentary cycles. The effect of the Caledonian and Hercynian orogeneses may be inferred from the main breaks between formations (Sadek, 1977 andBuday, 1980). The cycles from older to younger are:…”

“…Arabian Plate and the mixture of clastics and carbonates in the eastern side, Iranian Plate (Sadek, 1977). The Ordovician sediments are represented by thick layers of sandstones and shales of Khabour Formation (Fig.…”