From renowned geologist Paul Hoffman
"Hoffman explained that there was indeed a sedimentary basin beneath the sands in that region of Namibia and Botswana, but it wasn’t as deep or as promising as ReconAfrica claimed. The rocks in the basin had long ago been “cooked” by the Earth’s internal heat and pressure from mountain building as the continent was formed, Hoffman argued, which meant that any oil or gas in the basin had long been boiled off. To Hoffman, this was not a complicated insight. It was Geology 101.
“So there’s no oil and gas there?”
“Extremely unlikely.”"