(PDF)于2014-10-20). Jan Golonka (2000) "Geodynamic Evolution of the South Caspian Basin". In Yilmaz, Isaksen, & AAP, eds., Oil and Gas of the Greater Caspian Area
Creodonta) in the Clarks Fork Basin, Wyoming (PDF). Contributions From the Museum of Paleontology (The University of Michigan). 30 Sep 1991, 28 (7): 141–180
East Gas Field)的巴涅特頁岩(英语:Barnett Shale)區的產量排名第2,和在密西根盆地(英语:MichiganBasin)的安存頁岩(英语:Antrim Shale)區的氣田產量排名第13。美國非常規天然氣(英语:Unconventional gas)鑽井的數量從2004年的18