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[[file:M106Ch07Fig03.jpg|thumb|300px|{{figure number|3}}Structural west-east section of the Risha area. Hercynian subcrop becomes progressively older toward the west. From Lüning et al.<ref name=Lüningetal_2006>Lüning, S., Loydell, D. K., Storch, P., Shahin, Y., and Craig, J., 2006, Origin, sequence stratigraphy and depositional environment of an Upper Ordovician (Hirnantian) deglacial black shale, Jordan - Discussion: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 230, p. 352–355.</ref>]]
[[file:M106Ch07Fig03.jpg|thumb|300px|{{figure number|3}}Structural west-east section of the Risha area. Hercynian subcrop becomes progressively older toward the west. From Lüning et al.<ref name=Lüningetal_2006>Lüning, S., Loydell, D. K., Storch, P., Shahin, Y., and Craig, J., 2006, Origin, sequence stratigraphy and depositional environment of an Upper Ordovician (Hirnantian) deglacial black shale, Jordan - Discussion: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 230, p. 352–355.</ref>]]
[[file:M106Ch07Fig04.jpg|thumb|300px|{{figure number|4}} Isopach map of organic-rich Silurian shales with total gamma-ray values exceeding 150 API, corresponding to organic richness values of greater than 1–2%, depending on the degree of thermal maturation. Gamma-ray values in some wells have been adjusted according to offset shale baseline. From Lüning et al.<ref name=Lüningetal_2006 /> 5 km (3.1 mi).]]
[[file:M106Ch07Fig04.jpg|thumb|300px|{{figure number|4}} Isopach map of organic-rich Silurian shales with total gamma-ray values exceeding 150 API, corresponding to organic richness values of greater than 1–2%, depending on the degree of [[thermal maturation]]. Gamma-ray values in some wells have been adjusted according to offset shale baseline. From Lüning et al.<ref name=Lüningetal_2006 /> 5 km (3.1 mi).]]
Encouraged by recent high oil prices, a number of international oil companies have now entered the country to explore the oil shale deposits themselves where they are thermally immature and close to surface. Feasibility studies have been carried out for oil shale mining and in situ production by heating.
Encouraged by recent high oil prices, a number of international oil companies have now entered the country to explore the oil shale deposits themselves where they are thermally immature and close to surface. Feasibility studies have been carried out for oil shale mining and in situ production by heating.