Origin of these resources All of the fossil fuels were created in a period of time encompassing 100 million years.
(All of the fossil fuels; were created; T:in a period of time; T:Origin of these resources) (a period of time; encompassing; 100 million years)
All of the fossil fuels a period of time
were created encompassing
T:in a period of time T:Origin of these resources
100 million years