Oil and gas form from:
A)accumulation of inorganic material,such as clay particles in shale
B)oxidation of organic material at the surface
C)heating of rocks to metamorphic temperatures (at least 400$\degree$C)
D)heating and breakdown of long hydrocarbon chains into smaller molecules

Question

Quizplus · Accepted Answer

Oil and gas form primarily from the heating and breakdown of long hydrocarbon chains into smaller molecules. This process is called thermal maturation, and it occurs over millions of years as organic material is buried and subjected to high temperatures and pressures. The resulting hydrocarbons can migrate through porous rock and accumulate in reservoirs, such as sandstone or limestone, where they can be extracted.

Oil and Gas Form From: A)accumulation of Inorganic Material,such as Clay

Oil and Gas Form From:
A)accumulation of Inorganic Material,such as Clay