The Green River formation has some Trillion Barrels of so-far untapped reserves,
And huge quantities of liquid methane under the Atlantic Continental slope.
Cascadia Margin Methane Seeps
An unknown amount of methane is fluxing through continental margins, and up to ~5000 gigatons of carbon are stored in icy methane hydrate deposits within their sediment. Sources of this methane include biogenic production, disassociation of the methane hydrate layers, and deep thermogenic sources.