Keywords: GasDepositDiagram.jpg GasDepositDiagram svg Schematic cross-section of the subsurface illustrating types of natural gas deposits US Energy Information Administration http //www eia doe gov/oil_gas/natural_gas/special/ngresources/ngresources html 14 16 19 February 2010 UTC US Energy Information Administration US federal government PD-USGov original upload log page en wikipedia GasDepositDiagram jpg 2010-02-19 14 16 Plazak 718×473× 49984 bytes <nowiki> Schematic cross-section of the subsurface illustrating types of natural gas deposits US Energy Information Administration http //www eia doe gov/oil_gas/natural_gas/special/ngresources/ngresources html</nowiki> Shale gas Geological diagrams |