Wanderlust World Wanderlust World Fossil fuels concentrate in sedimentary basins—low areas where organic matter accumulated over millions of years, then transformed under heat and pressure.
Largest reserves: Middle East. Significant deposits also in North America, South America, Africa, Asia.
Top reserves: United States, China, Russia, India, Australia.
These basins often align with tectonic plate boundaries. Extraction occurs onshore and offshore (e.g., Gulf of Mexico, North Sea).