Assertion: gas | /r/AtLocation | mixed
Facets:
value: with water
type: OTHER
value: deep underground at great pressure
type: OTHER
Source sentences:
text: As technologies change, they present the possibility of extracting natural gas from even less-accessible formations—for instance, so-called geopressured reservoirs, where gas is found mixed with water deep underground at great pressure and high temperature, or methane hydrate reservoirs in certain ocean and polar regions, where great quantities of methane have formed unusual crystalline structures with frozen water.