It is hard to do because it is a liquid being taken out of a solid.
Petroleum is an oil. Gold ore is a golden ore rock, of sorts.Hope it is better than, "because it is."
A pluton is a body of rock formed from the cooling of magma under the surface.
oil and gas royalties
underground water soaking into rock and soil
Petroleum is a word derived from Latin: Petra - rock, oleum - oil. Thus, in direct translation petroleum means oil from rock and is commonly regarded as a very close synonym of Crude Oil. However, according to Britannica Encyclopedia, petroleum as a technical term encompasses: the liquid (crude oil), gaseous (natural gas), and viscous or solid forms (bitumen and asphalt).
hard rock mining, underground mining
hard rock is more mainstream and well known. while metal is more underground.
Petroleum is not considered a rock. The definition of rock includes the word 'solid'.
you need to steel a flag
Petroleum migration is the movement of hydrocarbons from a source rock to a reservoir rock in which the hydrocarbon is impede by traps
The cooling and hardening of magma deep underground results in igneous rock. Rare gems and diamonds can be found in igneous rock.
underground mining is done when the rocks, minerals of gemstones are too far underground to get out with surface mining some kinds of underground mining are Borehole Mining Drift Mining Hard Rock Mining Shaft Mining Slope Mining
A rock at the surface will cool faster than a rock underground.
In the underground laboratory of Mordred, the wall to the left is not rock, just dirt. Push hard against it and it will collapse. (see related question)
Sedimentary rock such as shale or limestone
Source rock; reservoir rock; cap rock
A Gabbro.