+Kerogen is a vast, insoluble organic solid, born from ancient life, trapped within [Sedimentary Rock](/wiki/sedimentary_rock) deep beneath the Earth's surface. Over eons, under immense heat and pressure, this buried organic matter slowly transforms into [Petroleum](/wiki/petroleum) and natural gas.
+## See also
+- [Fossil Fuel](/wiki/fossil_fuel)
+- [Shale Oil](/wiki/shale_oil)
+- [Natural Gas](/wiki/natural_gas)
... 1 more lines