Page 16 - PPT4

Formation of Petroleum

• Millions of years ago, these dead wildlife and vegetation

decomposed and got mixed with sand and silt.

• Certain bacteria helped in the decomposition of this

organic matter and caused some chemical changes.

• The partially decomposed matter remained on the

seabed and eventually was covered with multiple layers

of sand and silt.

• This burying took millions of years, and finally, due to

high temperature and pressure, the organic matter

decomposed completely and formed crude oil.