GENERAL GEOLOGY

Detailed explanation-1: -Based on the established source rocks quality values (Table 3), it can be noticed that if the TOC of source rock is greater than 1 percent, the rock can be a good source rock. If the rock contains greater than 4 percent Total Organic Carbon, then it has an excellent petroleum potential.

Detailed explanation-2: -Total organic carbon (TOC) is the main measurement used for estimating the quality and productivity of a source rock. The source rock-usually an organic rich shale-contains various carbon compounds such as kerogen, bitumen, oil and gas.

Detailed explanation-3: -The source rocks satisfy three geochemical requirements such as quantity (amount of organic matter), quality (type of organic matter or kerogen type) and thermal maturity (extent of burial heating) (Peters and Cassa, 1994) . In this study, the quantity of organic matter was measured as TOC (wt.

Detailed explanation-4: -The Ghanaian portion of this formation is known as Tano Basin and it covers 1, 165 sqkm between the mouths of the Ankobra River in the east and the Tano River in the west. The formation is made of Cretaceous-Eocene marine sedimentary rocks. The rocks consist of alternating sands, clays and limestones.