By 10â12 million years ago, the hyena family had split into two distinct groups; that of the dog-like hyenas and the bone-crushing hyenas. The arrival of the ancestral bone-crushing hyenas coincided with the decline of the similarly built but unrelated Percrocutidae family.
Whiting Petroleum Corporation is a Denver-based oil and gas exploration and production company. The company focuses on exploitation of lower risk properties, primarily on those located in the Gulf Coast, Permian Basin, Rocky Mountains, Michigan and Mid-Continent regions of the United States.
Back to the Energy Systems Map. Conventional Gas refers to natural gas that can be produced from reservoirs using traditional drilling, pumping and compression techniques. Natural gas is a hydrocarbon gas formed over thousands of years from the burying of dead plants and animals.