does anyone know please?? any help would be greatly appreciated.. thanks xxxx
Posted Thu 27th September, 2012 @ 18:50 by Muzz :P
They were formed over millions of years, from the remains of dead organisms:
crude oil and gas were formed from dead sea creatures
coal was formed from dead plants
Crude oil is found trapped in some of the sedimentary rocks of the Earth's crust.
Millions of years ago, huge numbers of microscopic animals and plants - plankton - died and fell to the bottom of the sea. Their remains were covered by mud.
As the mud sediment was buried by more sediment, it started to change into rock, as the temperature and pressure increased. The plant and animal remains were ‘cooked’ by this process, and slowly changed into crude oil.